diff --git a/Models/ThemeConfig/Conversion/LegacyJsonConvert.ts b/Models/ThemeConfig/Conversion/LegacyJsonConvert.ts
index 7be672c92b..3c101939ee 100644
--- a/Models/ThemeConfig/Conversion/LegacyJsonConvert.ts
+++ b/Models/ThemeConfig/Conversion/LegacyJsonConvert.ts
@@ -17,16 +17,9 @@ export class UpdateLegacyLayer extends DesugaringStep<LayerConfigJson | string |
 
     convert(state: {}, json: LayerConfigJson, context: string): { result: LayerConfigJson; errors: string[]; warnings: string[] } {
         const warnings = []
-        if (typeof json === "string") {
-            return json
-        }
-        console.log("Updating legacy layer", json)
-        if (json["builtin"] !== undefined) {
-            return {
-                result: json,
-                errors: [],
-                warnings: []
-            };
+        if (typeof json === "string" || json["builtin"] !== undefined) {
+            // Reuse of an already existing layer; return as-is
+            return {result: json, errors: [], warnings: []}
         }
         let config: any = {...json};
 
@@ -40,7 +33,7 @@ export class UpdateLegacyLayer extends DesugaringStep<LayerConfigJson | string |
             let i = 0;
             for (const tagRendering of config.tagRenderings) {
                 i++;
-                if (typeof tagRendering === "string" || tagRendering["builtin"] !== undefined) {
+                if (typeof tagRendering === "string" || tagRendering["builtin"] !== undefined || tagRendering["rewrite"] !== undefined) {
                     continue
                 }
                 if (tagRendering["id"] === undefined) {
@@ -150,7 +143,7 @@ class UpdateLegacyTheme extends DesugaringStep<LayoutConfigJson> {
         }
 
         oldThemeConfig.layers = Utils.NoNull(oldThemeConfig.layers)
-
+        delete oldThemeConfig["language"]
         return {
             errors: [],
             warnings: [],
diff --git a/assets/themes/aed/aed.json b/assets/themes/aed/aed.json
index 9fb237ebe6..5c1a94ad62 100644
--- a/assets/themes/aed/aed.json
+++ b/assets/themes/aed/aed.json
@@ -38,24 +38,6 @@
     "nb_NO": "Defibrillatorer i nærheten",
     "hu": "Ezen a térképen a közeli defibrillátorokat lehet megtalálni és feltüntetni"
   },
-  "language": [
-    "en",
-    "ca",
-    "es",
-    "fr",
-    "nl",
-    "de",
-    "hu",
-    "id",
-    "it",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "nb_NO",
-    "sv",
-    "pl",
-    "pt_BR"
-  ],
   "version": "2020-08-29",
   "startLat": 0,
   "startLon": 0,
diff --git a/assets/themes/aed/aed_brugge.json b/assets/themes/aed/aed_brugge.json
index 01b530198f..a0b5933e25 100644
--- a/assets/themes/aed/aed_brugge.json
+++ b/assets/themes/aed/aed_brugge.json
@@ -8,9 +8,6 @@
   "description": {
     "nl": "Op deze kaart kan je informatie over AEDs vinden en verbeteren + een export van de brugse defibrillatoren"
   },
-  "language": [
-    "nl"
-  ],
   "version": "2021-05-16",
   "startLat": 51.25634,
   "startLon": 3.195682,
diff --git a/assets/themes/artwork/artwork.json b/assets/themes/artwork/artwork.json
index b25a00387a..c7f4bd5b8f 100644
--- a/assets/themes/artwork/artwork.json
+++ b/assets/themes/artwork/artwork.json
@@ -30,22 +30,6 @@
     "hu": "Isten hozta a nyílt műalkotástérképen, a világ minden táján megtalálható szobrok, mellszobrok, graffitik és más műalkotások gyűjtőhelyén",
     "pl": "Witaj w Open Artwork Map, mapie pomników, popierś, graffitti i innych dzieł sztuki z całego świata"
   },
-  "language": [
-    "en",
-    "nl",
-    "fr",
-    "de",
-    "hu",
-    "id",
-    "it",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "sv",
-    "pl",
-    "es",
-    "nb_NO"
-  ],
   "icon": "./assets/themes/artwork/artwork.svg",
   "maintainer": "MapComplete",
   "startZoom": 12,
diff --git a/assets/themes/benches/benches.json b/assets/themes/benches/benches.json
index f806fe50df..193b38d40b 100644
--- a/assets/themes/benches/benches.json
+++ b/assets/themes/benches/benches.json
@@ -38,20 +38,6 @@
     "zh_Hant": "這份地圖顯示開放街圖上所有記錄的長椅：單獨的長椅，屬於大眾運輸站點或涼亭的長椅。只要有開放街圖帳號，你可以新增長椅或是編輯既有長椅的詳細內容。",
     "hu": "Ez a térkép megjeleníti az OpenStreetMap-en rögzített összes padot: egyes padokat, valamint tömegközlekedési megállókban vagy menedékhelyeken található padokat. OpenStreetMap-fiókkal Ön is felrajzolhat új padokat, vagy szerkesztheti a meglévő padok részleteit."
   },
-  "language": [
-    "en",
-    "de",
-    "fr",
-    "nl",
-    "it",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "nb_NO",
-    "pt_BR",
-    "id",
-    "hu"
-  ],
   "maintainer": "Florian Edelmann",
   "icon": "./assets/themes/benches/bench_poi.svg",
   "version": "2020-10-23",
diff --git a/assets/themes/bicyclelib/bicyclelib.json b/assets/themes/bicyclelib/bicyclelib.json
index c98ad2a0a4..b3ee810bf4 100644
--- a/assets/themes/bicyclelib/bicyclelib.json
+++ b/assets/themes/bicyclelib/bicyclelib.json
@@ -2,20 +2,6 @@
   "id": "bicyclelib",
   "maintainer": "MapComplete",
   "version": "2020-08-29",
-  "language": [
-    "en",
-    "nl",
-    "it",
-    "ru",
-    "ja",
-    "fr",
-    "zh_Hant",
-    "nb_NO",
-    "de",
-    "pt_BR",
-    "pl",
-    "hu"
-  ],
   "title": {
     "en": "Bicycle libraries",
     "nl": "Fietsbibliotheken",
diff --git a/assets/themes/binoculars/binoculars.json b/assets/themes/binoculars/binoculars.json
index 46abdf4ec3..1e77b49c63 100644
--- a/assets/themes/binoculars/binoculars.json
+++ b/assets/themes/binoculars/binoculars.json
@@ -26,15 +26,6 @@
     "zh_Hant": "固定一地的望遠鏡地圖，特別是能夠在旅遊景點、觀景點、城鎮環景點，或是自然保護區找到。",
     "hu": "Rúdra rögzített távcsövek térképe. Jellemzően turisztikailag érdekes, panorámás helyeken, kilátótornyok tetején vagy természetvédelmi területen találhatók."
   },
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "it",
-    "nb_NO",
-    "zh_Hant",
-    "hu"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/binocular/telescope.svg",
   "version": "0",
diff --git a/assets/themes/bookcases/bookcases.json b/assets/themes/bookcases/bookcases.json
index c05a5479a2..23c116e2b3 100644
--- a/assets/themes/bookcases/bookcases.json
+++ b/assets/themes/bookcases/bookcases.json
@@ -2,19 +2,6 @@
   "id": "bookcases",
   "maintainer": "MapComplete",
   "version": "2020-08-29",
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "fr",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "it",
-    "pt_BR",
-    "nb_NO",
-    "hu"
-  ],
   "title": {
     "en": "Open Bookcase Map",
     "nl": "Open boekenruilkasten-kaart",
diff --git a/assets/themes/buurtnatuur/buurtnatuur.json b/assets/themes/buurtnatuur/buurtnatuur.json
index e331bdf604..b8657f7a56 100644
--- a/assets/themes/buurtnatuur/buurtnatuur.json
+++ b/assets/themes/buurtnatuur/buurtnatuur.json
@@ -15,9 +15,6 @@
   "descriptionTail": {
     "nl": "<h4>Tips</h4><ul><li>Over groen ingekleurde gebieden weten we alles wat we willen weten.</li><li>Bij rood ingekleurde gebieden ontbreekt nog heel wat info: klik een gebied aan en beantwoord de vragen.</li><li>Je kan altijd een vraag overslaan als je het antwoord niet weet of niet zeker bent</li><li>Je kan altijd een foto toevoegen</li><li>Je kan ook zelf een gebied toevoegen door op de kaart te klikken</li><li>Open buurtnatuur.be <b>op je smartphone</b> om al wandelend foto's te maken en vragen te beantwoorden</li></ul><small><p>De oorspronkelijke data komt van <b>OpenStreetMap</b> en je antwoorden worden daar bewaard.<br/> Omdat iedereen vrij kan meewerken aan dit project, kunnen we niet garanderen dat er geen fouten opduiken.Kan je hier niet aanpassen wat je wilt, dan kan je dat zelf via OpenStreetMap.org doen. Groen kan <b>geen enkele verantwoordelijkheid</b> nemen over de kaart.</p>Je privacy is belangrijk. We tellen wel hoeveel gebruikers deze website bezoeken. We plaatsen een cookie waar geen persoonlijke informatie in bewaard wordt. Als je inlogt, komt er een tweede cookie bij met je inloggegevens.</small>"
   },
-  "language": [
-    "nl"
-  ],
   "maintainer": "Pieter Vander Vennet",
   "icon": "./assets/themes/buurtnatuur/groen_logo.svg",
   "version": "0",
diff --git a/assets/themes/cafes_and_pubs/cafes_and_pubs.json b/assets/themes/cafes_and_pubs/cafes_and_pubs.json
index db8c9bbaa4..5a69c68796 100644
--- a/assets/themes/cafes_and_pubs/cafes_and_pubs.json
+++ b/assets/themes/cafes_and_pubs/cafes_and_pubs.json
@@ -14,17 +14,6 @@
   "description": {
     "nl": "Cafés, kroegen en drinkgelegenheden"
   },
-  "language": [
-    "nl",
-    "en",
-    "de",
-    "it",
-    "nb_NO",
-    "id",
-    "zh_Hant",
-    "ru",
-    "hu"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/cafe_pub/pub.svg",
   "version": "0",
diff --git a/assets/themes/campersite/campersite.json b/assets/themes/campersite/campersite.json
index 0a0f07986e..c2d64cb951 100644
--- a/assets/themes/campersite/campersite.json
+++ b/assets/themes/campersite/campersite.json
@@ -33,20 +33,6 @@
     "de": "Auf dieser Seite finden Sie alle offiziellen Wohnmobilstellplätze und Orte zur Entsorgung von Schmutzwasser. Sie können Details über die angebotenen Dienstleistungen und die Kosten hinzufügen. Fügen Sie Bilder und Bewertungen hinzu. Dies ist eine Webseite und eine Webapp. Die Daten werden in OpenStreetMap gespeichert, so dass sie für immer kostenlos sind und von jeder App weiterverwendet werden können.",
     "hu": "Ez az oldal az összes olyan hivatalos lakóautós megállóhelyet és helyet gyűjti össze, ahol szürke és fekete szennyvizet lehet üríteni. Hozzáadhat részleteket a nyújtott szolgáltatásokról és a költségekről, valamint képeket és értékeléseket. Ez egyszerre egy weboldal és egy webes alkalmazás. Az adatokat az OpenStreetMapen tároljuk, így mindig ingyenesek lesznek, és bármelyik alkalmazás újra felhasználhatja őket."
   },
-  "language": [
-    "en",
-    "nl",
-    "it",
-    "ru",
-    "ja",
-    "fr",
-    "zh_Hant",
-    "pt_BR",
-    "de",
-    "hu",
-    "id",
-    "nb_NO"
-  ],
   "maintainer": "joost schouppe",
   "icon": "./assets/themes/campersite/caravan.svg",
   "version": "0",
diff --git a/assets/themes/charging_stations/charging_stations.json b/assets/themes/charging_stations/charging_stations.json
index c62bb20e25..2b6fc04d27 100644
--- a/assets/themes/charging_stations/charging_stations.json
+++ b/assets/themes/charging_stations/charging_stations.json
@@ -32,18 +32,6 @@
     "de": "Auf dieser freien Karte kann man Informationen über Ladestationen finden und hinzufügen",
     "hu": "Ezen a térképen a elektromos töltőpontokról szóló információkat lehet megtalálni és megadni"
   },
-  "language": [
-    "en",
-    "id",
-    "it",
-    "ja",
-    "zh_Hant",
-    "nl",
-    "de",
-    "nb_NO",
-    "ru",
-    "hu"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/charging_stations/logo.svg",
   "version": "0",
diff --git a/assets/themes/climbing/climbing.json b/assets/themes/climbing/climbing.json
index 609081b778..31497c4204 100644
--- a/assets/themes/climbing/climbing.json
+++ b/assets/themes/climbing/climbing.json
@@ -31,20 +31,6 @@
     "fr": "La carte a été créée par <a href='https://utopicode.de/en/?ref=kletterspots' target='_blank'>Christian Neumann</a>. Merci de le <a href='https://utopicode.de/en/contact/?project=kletterspots&ref=kletterspots' target='blank'>contacter</a> pour des avis ou des questions.</p><p>Ce projet utilise les données <a href='https://www.openstreetmap.org/' target='_blank'>OpenStreetMap</a>.</p>",
     "it": "La cartina di arrampicata è stata originariamente creata da <a href='https://utopicode.de/en/?ref=kletterspots' target='_blank'>Christian Neumann</a>. Si prega di <a href='https://utopicode.de/en/contact/?project=kletterspots&ref=kletterspots' target='blank'>scrivere qua</a> se si hanno commenti o domande da fare.</p><p>Il progetto usa i dati del progetto <a href='https://www.openstreetmap.org/' target='_blank'>OpenStreetMap</a>.</p>"
   },
-  "language": [
-    "nl",
-    "de",
-    "en",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "nb_NO",
-    "it",
-    "fr",
-    "ca",
-    "id",
-    "eo"
-  ],
   "maintainer": "Christian Neumann <christian@utopicode.de>",
   "icon": "./assets/themes/climbing/climbing_icon.svg",
   "version": "0",
diff --git a/assets/themes/cycle_highways/cycle_highways.json b/assets/themes/cycle_highways/cycle_highways.json
index 266312e591..a1d403c381 100644
--- a/assets/themes/cycle_highways/cycle_highways.json
+++ b/assets/themes/cycle_highways/cycle_highways.json
@@ -15,11 +15,6 @@
     "de": "Diese Karte zeigt Radschnellwege",
     "it": "Questa cartina mostra le strade per velocipedi"
   },
-  "language": [
-    "en",
-    "de",
-    "it"
-  ],
   "version": "2021-08-23",
   "startLat": 51.1599,
   "startLon": 3.3475,
diff --git a/assets/themes/cycle_infra/cycle_infra.json b/assets/themes/cycle_infra/cycle_infra.json
index 68330f8e9c..581bcfb319 100644
--- a/assets/themes/cycle_infra/cycle_infra.json
+++ b/assets/themes/cycle_infra/cycle_infra.json
@@ -24,15 +24,6 @@
     "it": "Una cartina dove vedere e modificare gli elementi riguardanti l’infrastruttura dei velocipedi. Realizzata durante #osoc21.",
     "zh_Hant": "可以檢視與編輯單車相關設施的地圖，在 #os0c21時製作。"
   },
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "it",
-    "nb_NO",
-    "ru",
-    "zh_Hant"
-  ],
   "maintainer": "MapComplete",
   "hideFromOverview": false,
   "defaultBackgroundId": "CartoDB.Voyager",
diff --git a/assets/themes/cyclenodes/cyclenodes.json b/assets/themes/cyclenodes/cyclenodes.json
index d1bc138a1c..c3980cd8bd 100644
--- a/assets/themes/cyclenodes/cyclenodes.json
+++ b/assets/themes/cyclenodes/cyclenodes.json
@@ -8,10 +8,6 @@
     "en": "This map shows cycle node networks and allows you to add new nodes easily",
     "de": "Diese Karte zeigt Knotenpunktnetzwerke für Radfahrer und erlaubt auch neue Knoten zu mappen"
   },
-  "language": [
-    "en",
-    "de"
-  ],
   "maintainer": "Sebastian Kürten",
   "icon": "./assets/themes/cyclenodes/logo.svg",
   "version": "0",
diff --git a/assets/themes/cyclestreets/cyclestreets.json b/assets/themes/cyclestreets/cyclestreets.json
index a136d751e5..3e6a3b6c79 100644
--- a/assets/themes/cyclestreets/cyclestreets.json
+++ b/assets/themes/cyclestreets/cyclestreets.json
@@ -28,17 +28,6 @@
     "it": "Una strada ciclabile è una strada dove <b>il traffico motorizzato non può superare i velocipedi</b>. La sua presenza è segnalata da un cartello stradale specifico. Le strade ciclabili sono diffuse in Olanda e Belgio, ma si possono trovare anche in Germania e in Francia. "
   },
   "icon": "./assets/themes/cyclestreets/F111.svg",
-  "language": [
-    "nl",
-    "en",
-    "ja",
-    "zh_Hant",
-    "de",
-    "it",
-    "nb_NO",
-    "ru",
-    "eo"
-  ],
   "startLat": 51.2095,
   "startZoom": 14,
   "startLon": 3.2228,
diff --git a/assets/themes/cyclofix/cyclofix.json b/assets/themes/cyclofix/cyclofix.json
index 2db04571f6..99ec5635b1 100644
--- a/assets/themes/cyclofix/cyclofix.json
+++ b/assets/themes/cyclofix/cyclofix.json
@@ -24,19 +24,6 @@
     "it": "Questa mappa offre a chi va in bici una soluzione semplice per trovare tutte le infrastrutture di cui ha bisogno.<br><br>Puoi tracciare la tua posizione esatta (solo su mobile) e selezionare i livelli che ti interessano nell'angolo in basso a sinistra. Puoi anche usare questo strumento per aggiungere o modificare punti di interesse alla mappa e aggiungere nuove informazioni rispendendo alle domande.<br><br>Tutte le modifiche che apporterai saranno automaticamente salvate nel database mondiale di OpenStreetMap e potranno essere liberamente riutilizzate da tutti e tutte.<br><br>Per maggiori informazioni sul progetto ciclofix, visita <a href='https://cyclofix.osm.be/'>cyclofix.osm.be</a>.",
     "hu": "Ez a térkép kerékpárosoknak kíván könnyen használható megoldást nyújtani a számukra fontos infrastruktúra megtalálásához.<br><br>A bal alsó sarokban nyomon követheti pontos tartózkodási helyét (csak mobilon), és kiválaszthatja az Ön számára fontos rétegeket. Az eszköz segítségével gombostűket (érdekes pontokat, POI-kat) is szerkeszthet vagy felrajzolhat a térképre, a kérdések megválaszolásával pedig további adatokat szolgáltathat.<br><br>Minden módosítás automatikusan elmentődik az OpenStreetMap globális adatbázisában, és mások szabadon újra felhasználhatják.<br><br>A cyclofix projektről további információkat a <a href='https://cyclofix.osm.be/'>cyclofix.osm.be</a> oldalon talál."
   },
-  "language": [
-    "en",
-    "nl",
-    "fr",
-    "gl",
-    "de",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "it",
-    "nb_NO",
-    "hu"
-  ],
   "maintainer": "MapComplete",
   "credits": "Originally created during Open Summer of Code by Pieter Fiers, Thibault Declercq, Pierre Barban, Joost Schouppe and Pieter Vander Vennet",
   "icon": "./assets/themes/cyclofix/logo.svg",
diff --git a/assets/themes/drinking_water/drinking_water.json b/assets/themes/drinking_water/drinking_water.json
index b68c9ece37..17b8ab1b25 100644
--- a/assets/themes/drinking_water/drinking_water.json
+++ b/assets/themes/drinking_water/drinking_water.json
@@ -23,18 +23,6 @@
     "nb_NO": "Offentlig tilgjengelig drikkevannssteder",
     "hu": "Ezen a térképen a nyilvánosan hozzáférhető ivóvíznyerő helyek láthatók, szerkeszthetők és rajzolhatók fel könnyedén"
   },
-  "language": [
-    "en",
-    "nl",
-    "fr",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "it",
-    "de",
-    "nb_NO",
-    "hu"
-  ],
   "maintainer": "MapComplete",
   "icon": "./assets/themes/drinking_water/logo.svg",
   "version": "0",
diff --git a/assets/themes/entrances/entrances.json b/assets/themes/entrances/entrances.json
index 0767dc4a37..fcbe0589d1 100644
--- a/assets/themes/entrances/entrances.json
+++ b/assets/themes/entrances/entrances.json
@@ -13,10 +13,6 @@
     "en": "Survey entrances to help wheelchair routing",
     "zh_Hant": "幫助輪椅導航來勘查出入口"
   },
-  "language": [
-    "en",
-    "zh_Hant"
-  ],
   "version": "2021-12-04",
   "maintainer": "MapComplete",
   "layers": [
diff --git a/assets/themes/etymology.json b/assets/themes/etymology.json
index dc828d6af1..ada72da0ae 100644
--- a/assets/themes/etymology.json
+++ b/assets/themes/etymology.json
@@ -22,14 +22,6 @@
     "it": "Su questa cartina sono visibili i nomi a cui sono riferiti gli oggetti. Le strade, gli edifici, etc. provengono da OpenStreetMap che è a sua volta collegata a Wikidata. Nel popup, se esiste, verrà mostrato l’articolo Wikipedia o l'elemento Wikidata a cui si riferisce il nome di quell’oggetto. Se l’oggetto stesso ha una pagina Wikpedia, anch’essa verrà mostrata.<br/><br/><b>Anche tu puoi contribuire!</b>Ingrandisci abbastanza e <i>tutte</i> le strade appariranno. Puoi cliccare su una e apparirà un popup con la ricerca Wikidata. Con pochi clic puoi aggiungere un collegamento etimologico. Tieni presente che per farlo, hai bisogno di un account gratuito su OpenStreetMap.",
     "zh_Hant": "在這份地圖，你可以看到物件是以何命名，道路、 建築等的命名由來連到 Wikidata。在跳出選單，你可以看到物件命名由來的維基條目 (如果有的話)，或是 Wikidata 框。如果物件本身有維基頁面，也會顯示。<br/><br/><b>你也可以貢獻！</b>放大到夠大的層級，然後<i>所有</i>道路都會顯示。你可以點選一個之後 Wikidata 搜尋框會跳出來。只要點幾下，你可以新增詞源連結。注意你要有開放街圖帳號才能這麼做。"
   },
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "it",
-    "ru",
-    "zh_Hant"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/etymology/logo.svg",
   "version": "0",
diff --git a/assets/themes/facadegardens/facadegardens.json b/assets/themes/facadegardens/facadegardens.json
index 00bf0839ce..0c5207b4de 100644
--- a/assets/themes/facadegardens/facadegardens.json
+++ b/assets/themes/facadegardens/facadegardens.json
@@ -26,18 +26,6 @@
     "de": "<a href='https://nl.wikipedia.org/wiki/Geveltuin' target=_blank>Fassadengärten</a>, grüne Fassaden und Bäume in der Stadt bringen nicht nur Ruhe und Frieden, sondern auch eine schönere Stadt, eine größere Artenvielfalt, einen Kühleffekt und eine bessere Luftqualität. <br/> Klimaan VZW und Mechelen Klimaatneutraal wollen bestehende und neue Fassadengärten als Beispiel für Menschen, die ihren eigenen Garten anlegen wollen, oder für naturverbundene Stadtspaziergänger kartieren.<br/>Mehr Informationen über das Projekt unter <a href='https://klimaan.be/' target=_blank>klimaan.be</a>.",
     "it": "I <a href='https://nl.wikipedia.org/wiki/Geveltuin' target=_blank>giardini veritcali</a> e gli alberi in città non solo portano pace e tranquillità ma creano anche un ambiente più bello, aumentano la biodiversità, rendono il clima più fresco e migliorano la qualità dell’aria. <br/> Klimaan VZW e Mechelen Klimaatneutraal vogliono mappare sia i giardini verticali esistenti che quelli nuovi per mostrarli a quanti vogliono costruire un loro proprio giardino o per quelli che amano la natura e vogliono camminare per la città.<br/>Per ulteriori informazioni visita <a href='https://klimaan.be/' target=_blank>klimaan.be</a>."
   },
-  "language": [
-    "nl",
-    "en",
-    "ja",
-    "zh_Hant",
-    "it",
-    "fr",
-    "de",
-    "nb_NO",
-    "ru",
-    "eo"
-  ],
   "maintainer": "joost schouppe; stla",
   "icon": "./assets/themes/facadegardens/geveltuin.svg",
   "version": "0",
diff --git a/assets/themes/food/food.json b/assets/themes/food/food.json
index 269135161f..5304e0c385 100644
--- a/assets/themes/food/food.json
+++ b/assets/themes/food/food.json
@@ -11,14 +11,6 @@
   "description": {
     "nl": "Restaurants en fast food"
   },
-  "language": [
-    "nl",
-    "en",
-    "de",
-    "it",
-    "nb_NO",
-    "zh_Hant"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/food/restaurant.svg",
   "version": "0",
diff --git a/assets/themes/fritures/fritures.json b/assets/themes/fritures/fritures.json
index c2219cd49c..a2950a5190 100644
--- a/assets/themes/fritures/fritures.json
+++ b/assets/themes/fritures/fritures.json
@@ -7,13 +7,6 @@
   "description": {
     "nl": "Op deze kaart vind je je favoriete frituur!"
   },
-  "language": [
-    "nl",
-    "fr",
-    "en",
-    "de",
-    "it"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/fritures/logo.svg",
   "version": "0",
diff --git a/assets/themes/fruit_trees/fruit_trees.json b/assets/themes/fruit_trees/fruit_trees.json
index 6e93dabe58..3b687bd89c 100644
--- a/assets/themes/fruit_trees/fruit_trees.json
+++ b/assets/themes/fruit_trees/fruit_trees.json
@@ -9,9 +9,6 @@
   "description": {
     "nl": "Op deze kaart vindt je boomgaarden en fruitbomen"
   },
-  "language": [
-    "nl"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/fruit_trees/fruit_tree.svg",
   "version": "0",
diff --git a/assets/themes/ghostbikes/ghostbikes.json b/assets/themes/ghostbikes/ghostbikes.json
index e8912328c2..8bcdedc110 100644
--- a/assets/themes/ghostbikes/ghostbikes.json
+++ b/assets/themes/ghostbikes/ghostbikes.json
@@ -2,25 +2,6 @@
   "id": "ghostbikes",
   "maintainer": "MapComplete",
   "version": "2020-08-30",
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "ja",
-    "nb_NO",
-    "zh_Hant",
-    "fr",
-    "eo",
-    "es",
-    "fi",
-    "gl",
-    "hu",
-    "it",
-    "pl",
-    "pt_BR",
-    "ru",
-    "sv"
-  ],
   "title": {
     "en": "Ghost bikes",
     "nl": "Witte Fietsen",
diff --git a/assets/themes/grb_import/grb.json b/assets/themes/grb_import/grb.json
index 74f059e865..5b3226ad53 100644
--- a/assets/themes/grb_import/grb.json
+++ b/assets/themes/grb_import/grb.json
@@ -10,11 +10,6 @@
     "nl": "Dit thema helpt het GRB importeren.",
     "en": "This theme is an attempt to help automating the GRB import."
   },
-  "language": [
-    "nl",
-    "en",
-    "de"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/grb_import/housenumber_blank.svg",
   "version": "0",
diff --git a/assets/themes/grb_import/grb_fixme.json b/assets/themes/grb_import/grb_fixme.json
index f9e7f71dce..313b5efb67 100644
--- a/assets/themes/grb_import/grb_fixme.json
+++ b/assets/themes/grb_import/grb_fixme.json
@@ -9,11 +9,6 @@
   "description": {
     "nl": "Gebouwen met een FIXME - wss GRB-import die gefixed moeten worden"
   },
-  "language": [
-    "nl",
-    "en",
-    "de"
-  ],
   "maintainer": "",
   "icon": "./assets/svg/bug.svg",
   "version": "0",
diff --git a/assets/themes/grb_import/missing_streets.json b/assets/themes/grb_import/missing_streets.json
index dc82fc85b2..38228f7809 100644
--- a/assets/themes/grb_import/missing_streets.json
+++ b/assets/themes/grb_import/missing_streets.json
@@ -9,9 +9,6 @@
   "description": {
     "nl": "Dit thema voegt automatisch straatnamen toe aan gebouwen met huisnummer en overeenkomstig CRAB-adres."
   },
-  "language": [
-    "nl"
-  ],
   "maintainer": "",
   "icon": "./assets/svg/robot.svg",
   "version": "0",
diff --git a/assets/themes/hackerspaces/hackerspaces.json b/assets/themes/hackerspaces/hackerspaces.json
index 57b4bef379..4617b137e8 100644
--- a/assets/themes/hackerspaces/hackerspaces.json
+++ b/assets/themes/hackerspaces/hackerspaces.json
@@ -19,13 +19,6 @@
     "it": "Su questa cartina è possibile vedere gli hackerspace, aggiungerne di nuovi o aggiornare le informazioni tutto in maniera pratica",
     "zh_Hant": "在這份地圖上你可以看到駭客空間，新增或直接更新資料"
   },
-  "language": [
-    "en",
-    "de",
-    "it",
-    "ru",
-    "zh_Hant"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/hackerspaces/glider.svg",
   "version": "0",
diff --git a/assets/themes/hailhydrant/hailhydrant.json b/assets/themes/hailhydrant/hailhydrant.json
index 012ee74a7a..a135d0f4ef 100644
--- a/assets/themes/hailhydrant/hailhydrant.json
+++ b/assets/themes/hailhydrant/hailhydrant.json
@@ -30,17 +30,6 @@
     "it": "In questa cartina puoi vedere e aggiornare idranti, stazioni dei pompieri, stazioni delle ambulanze ed estintori del tuo quartiere preferito.\n\nPuoi seguire la tua posizione precisa (solo su cellulare) e selezionare i livelli che ti interessano nell’angolo in basso a sinistra. Puoi anche usare questo strumento per aggiungere o modificare i PDI sulla mappa e fornire ulteriori dettagli rispondendo alle domande.\n\nTutte le modifiche che farai verranno automaticamente salvate nel database globale di OpenStreetMap e potranno essere riutilizzate liberamente da tutti.",
     "hu": "Ezen a térképen tűzcsapokat, tűzoltóállomásokat, mentőállomásokat és tűzoltóállomásokat találhat és szerkeszthet kedvenc városrészeiben (vagy másutt).\n\nA bal alsó sarokban nyomon követheti pontos tartózkodási helyét (csak mobilon), és kiválaszthatja az Ön számára releváns rétegeket. Ezzel az eszközzel gombostűket (érdekes pontokat, POI-kat) is szerkeszthet vagy felrajzolhat a térképre, a rendelkezésre álló kérdések megválaszolásával pedig további részleteket adhat meg.\n\nAz Ön által elvégzett módosítások automatikusan elmentődnek az OpenStreetMap globális adatbázisában, és mások szabadon újra felhasználhatják azokat."
   },
-  "language": [
-    "en",
-    "ja",
-    "zh_Hant",
-    "ru",
-    "fr",
-    "it",
-    "nb_NO",
-    "de",
-    "hu"
-  ],
   "maintainer": "Erwin Olario",
   "icon": "./assets/themes/hailhydrant/logo.svg",
   "version": "0",
diff --git a/assets/themes/mapcomplete-changes/mapcomplete-changes.json b/assets/themes/mapcomplete-changes/mapcomplete-changes.json
index 392eabd718..5b57cbb7f1 100644
--- a/assets/themes/mapcomplete-changes/mapcomplete-changes.json
+++ b/assets/themes/mapcomplete-changes/mapcomplete-changes.json
@@ -9,9 +9,6 @@
   "description": {
     "en": "This maps shows all the changes made with MapComplete"
   },
-  "language": [
-    "en"
-  ],
   "maintainer": "",
   "icon": "./assets/svg/logo.svg",
   "hideFromOverview": true,
diff --git a/assets/themes/maps/maps.json b/assets/themes/maps/maps.json
index b2088fb699..305eb4a17c 100644
--- a/assets/themes/maps/maps.json
+++ b/assets/themes/maps/maps.json
@@ -30,18 +30,6 @@
     "de": "Auf dieser Karte findest du alle Karten, die OpenStreetMap kennt - typischerweise eine große Karte auf einer Informationstafel, die das Gebiet, die Stadt oder die Region zeigt, z.B. eine touristische Karte auf der Rückseite einer Plakatwand, eine Karte eines Naturschutzgebietes, eine Karte der Radwegenetze in der Region, ...) <br/><br/>Wenn eine Karte fehlt, können Sie diese leicht auf OpenStreetMap kartieren.",
     "it": "In questa carta puoi trovare tutte le mappe conosciute da OpenStreetMap (tipicamente una grossa mappa su di un pannello informativo che mostra l’area, la città o la regione, ad es. una mappa turistica dietro a un manifesto, la mappa di una riserva naturale, la mappa della rete ciclistica regionale, etc.)<br/><br/>Se manca una mappa, puoi aggiungerla facilmente a questa su OpenStreetMap."
   },
-  "language": [
-    "en",
-    "nl",
-    "fr",
-    "ja",
-    "zh_Hant",
-    "ru",
-    "de",
-    "eo",
-    "it",
-    "nb_NO"
-  ],
   "maintainer": "MapComplete",
   "icon": "./assets/themes/maps/logo.svg",
   "version": "0",
diff --git a/assets/themes/nature/nature.json b/assets/themes/nature/nature.json
index edd29baf35..e8768db5d6 100644
--- a/assets/themes/nature/nature.json
+++ b/assets/themes/nature/nature.json
@@ -9,9 +9,6 @@
   "description": {
     "nl": "Op deze kaart vind je informatie voor natuurliefhebbers, zoals info over het natuurgebied waar je inzit, vogelkijkhutten, informatieborden, ..."
   },
-  "language": [
-    "nl"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/nature/logo.svg",
   "version": "0",
diff --git a/assets/themes/natuurpunt/natuurpunt.json b/assets/themes/natuurpunt/natuurpunt.json
index 7f98d18839..b156cea501 100644
--- a/assets/themes/natuurpunt/natuurpunt.json
+++ b/assets/themes/natuurpunt/natuurpunt.json
@@ -21,14 +21,6 @@
     "de": "Auf dieser Karte können Sie alle Naturschutzgebiete von Natuurpunt finden ",
     "zh_Hant": "在這張地圖上您可以找到 Natuurpunt 提供的所有自然保護區 "
   },
-  "language": [
-    "nl",
-    "en",
-    "de",
-    "nb_NO",
-    "it",
-    "zh_Hant"
-  ],
   "mustHaveLanguage": [
     "nl"
   ],
diff --git a/assets/themes/observation_towers/observation_towers.json b/assets/themes/observation_towers/observation_towers.json
index 37bc49f3d8..05544f26b4 100644
--- a/assets/themes/observation_towers/observation_towers.json
+++ b/assets/themes/observation_towers/observation_towers.json
@@ -22,14 +22,6 @@
     "it": "Torri pubblicamente accessibili per godere della vista",
     "zh_Hant": "開放可及能觀景的高塔"
   },
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "it",
-    "ru",
-    "zh_Hant"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/observation_tower/Tower_observation.svg",
   "version": "0",
diff --git a/assets/themes/openwindpowermap/openwindpowermap.json b/assets/themes/openwindpowermap/openwindpowermap.json
index 51d5ff8b08..351c476537 100644
--- a/assets/themes/openwindpowermap/openwindpowermap.json
+++ b/assets/themes/openwindpowermap/openwindpowermap.json
@@ -17,17 +17,6 @@
     "it": "Una cartina per la visione e la modifica delle turbine eoliche.",
     "zh_Hant": "顯示與編輯風機的地圖。"
   },
-  "language": [
-    "en",
-    "fr",
-    "de",
-    "it",
-    "ru",
-    "zh_Hant",
-    "nl",
-    "eo",
-    "nb_NO"
-  ],
   "version": "2021-06-18",
   "startLat": 50.52,
   "startLon": 4.643,
diff --git a/assets/themes/parkings/parkings.json b/assets/themes/parkings/parkings.json
index 1c5d9801c2..e998548c28 100644
--- a/assets/themes/parkings/parkings.json
+++ b/assets/themes/parkings/parkings.json
@@ -24,15 +24,6 @@
     "it": "Questa cartina mostra diversi posti dove parcheggiare",
     "zh_Hant": "這地圖顯示不同的停車空間"
   },
-  "language": [
-    "nl",
-    "en",
-    "de",
-    "it",
-    "nb_NO",
-    "ru",
-    "zh_Hant"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/parkings/parkings.svg",
   "version": "0",
diff --git a/assets/themes/personal/personal.json b/assets/themes/personal/personal.json
index b5474cda13..33804b000f 100644
--- a/assets/themes/personal/personal.json
+++ b/assets/themes/personal/personal.json
@@ -26,20 +26,6 @@
     "ru": "Создать персональную тему на основе доступных слоёв тем. Чтобы отобразить некоторые данные, откройте <a href='#filter'>выбор слоя</a>",
     "it": "Crea un tema personale basato sui livelli disponibili per tutti i temi. Per mostrare dei dati, apri <a href='#filter'>selezione livello</a>"
   },
-  "language": [
-    "en",
-    "nl",
-    "es",
-    "ca",
-    "gl",
-    "fr",
-    "de",
-    "ja",
-    "zh_Hant",
-    "it",
-    "nb_NO",
-    "ru"
-  ],
   "maintainer": "MapComplete",
   "icon": "./assets/svg/addSmall.svg",
   "clustering": {
diff --git a/assets/themes/play_forests/play_forests.json b/assets/themes/play_forests/play_forests.json
index 96aedcf5db..7c6950912c 100644
--- a/assets/themes/play_forests/play_forests.json
+++ b/assets/themes/play_forests/play_forests.json
@@ -9,9 +9,6 @@
   "description": {
     "nl": "Een speelbos is een zone in een bos die vrij toegankelijk is voor spelende kinderen. Deze wordt  in bossen van het Agentschap Natuur en bos altijd aangeduid met het overeenkomstige bord."
   },
-  "language": [
-    "nl"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/play_forest/icon.svg",
   "version": "0",
diff --git a/assets/themes/playgrounds/playgrounds.json b/assets/themes/playgrounds/playgrounds.json
index fcf3b22cc3..3d91924f4e 100644
--- a/assets/themes/playgrounds/playgrounds.json
+++ b/assets/themes/playgrounds/playgrounds.json
@@ -32,17 +32,6 @@
     "de": "Auf dieser Karte finden Sie Spielplätze und können weitere Informationen hinzufügen",
     "it": "In questa cartina vengono mostrati i parchi giochi a cui è possibile aggiungere dettagli"
   },
-  "language": [
-    "nl",
-    "en",
-    "fr",
-    "ja",
-    "zh_Hant",
-    "ru",
-    "de",
-    "it",
-    "nb_NO"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/playgrounds/playground.svg",
   "version": "0",
diff --git a/assets/themes/postal_codes/postal_codes.json b/assets/themes/postal_codes/postal_codes.json
index ba9fff50ea..6c49674ff9 100644
--- a/assets/themes/postal_codes/postal_codes.json
+++ b/assets/themes/postal_codes/postal_codes.json
@@ -9,9 +9,6 @@
   "description": {
     "en": "Postal codes"
   },
-  "language": [
-    "en"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/postal_codes/townhall.svg",
   "version": "0",
diff --git a/assets/themes/postboxes/postboxes.json b/assets/themes/postboxes/postboxes.json
index 979a72efaa..04b233aefd 100644
--- a/assets/themes/postboxes/postboxes.json
+++ b/assets/themes/postboxes/postboxes.json
@@ -18,14 +18,6 @@
     "it": "In questa cartina puoi veder e modificare gli uffici postali e le buche delle lettere. Puoi usare questa cartina per trovare dove imbucare la tua prossima cartolina! :)<br/>Hai trovato un errore o una buca delle lettere mancante? Puoi modificare questa cartina con un account gratuito su OpenStreetMap. ",
     "zh_Hant": "在這份地圖你能找到與新增有關郵局與郵筒的資料，你可以用這份地圖找到寄送您下張明信片的地方！:)<br/>發現錯誤或是有郵筒遺漏嗎？你可以用免費的開放街圖帳號來編輯。 "
   },
-  "language": [
-    "en",
-    "de",
-    "nb_NO",
-    "it",
-    "zh_Hant",
-    "ru"
-  ],
   "maintainer": "nicolelaine",
   "icon": "./assets/themes/postboxes/postbox.svg",
   "version": "0",
diff --git a/assets/themes/shops/shops.json b/assets/themes/shops/shops.json
index 03c1e0ffae..8663780836 100644
--- a/assets/themes/shops/shops.json
+++ b/assets/themes/shops/shops.json
@@ -25,16 +25,6 @@
     "de": "Auf dieser Karte kann man grundlegende Informationen über Geschäfte markieren, Öffnungszeiten und Telefonnummern hinzufügen",
     "it": "In questa cartina è possibile aggiungere informazioni di base di un negozio, orari di apertura e numeri di telefono"
   },
-  "language": [
-    "en",
-    "fr",
-    "ja",
-    "zh_Hant",
-    "ru",
-    "de",
-    "it",
-    "nb_NO"
-  ],
   "maintainer": "MapComplete",
   "icon": "./assets/themes/shops/shop.svg",
   "version": "0",
diff --git a/assets/themes/sidewalks/sidewalks.json b/assets/themes/sidewalks/sidewalks.json
index c750c05fab..4c8246446d 100644
--- a/assets/themes/sidewalks/sidewalks.json
+++ b/assets/themes/sidewalks/sidewalks.json
@@ -11,10 +11,6 @@
     "en": "Experimental theme",
     "ru": "Экспериментальная тема"
   },
-  "language": [
-    "en",
-    "ru"
-  ],
   "maintainer": "",
   "icon": "./assets/svg/bug.svg",
   "version": "0",
diff --git a/assets/themes/speelplekken/speelplekken.json b/assets/themes/speelplekken/speelplekken.json
index 226c789153..db304b606c 100644
--- a/assets/themes/speelplekken/speelplekken.json
+++ b/assets/themes/speelplekken/speelplekken.json
@@ -10,10 +10,6 @@
   "description": {
     "nl": "<h3>Welkom bij de Groendoener!</h3>De Zuidrand dat is spelen, ravotten, chillen, wandelen,… in het groen. Meer dan <b>200 grote en kleine speelplekken</b> liggen er in parken, in bossen en op pleintjes te wachten om ontdekt te worden. De verschillende speelplekken werden getest én goedgekeurd door kinder- en jongerenreporters uit de Zuidrand. Met leuke challenges dagen de reporters jou uit om ook op ontdekking te gaan. Klik op een speelplek op de kaart, bekijk het filmpje en ga op verkenning!<br/><br/>Het project groendoener kadert binnen het strategisch project <a href='https://www.provincieantwerpen.be/aanbod/dlm/samenwerkingsverbanden/zuidrand/projecten/strategisch-project-beleefbare-open-ruimte.html' target='_blank'>Beleefbare Open Ruimte in de Antwerpse Zuidrand</a> en is een samenwerking tussen het departement Leefmilieu van provincie Antwerpen, Sportpret vzw, een OpenStreetMap-België Consultent en Createlli vzw. Het project kwam tot stand met steun van Departement Omgeving van de Vlaamse Overheid.<br/><img class='w-full md:w-1/2' src='./assets/themes/speelplekken/provincie_antwerpen.jpg'/><img class='w-full md:w-1/2' src='./assets/themes/speelplekken/Departement_Omgeving_Vlaanderen.png'/>"
   },
-  "language": [
-    "nl",
-    "*"
-  ],
   "maintainer": "MapComplete",
   "icon": "./assets/themes/speelplekken/logo.svg",
   "hideFromOverview": true,
diff --git a/assets/themes/sport_pitches/sport_pitches.json b/assets/themes/sport_pitches/sport_pitches.json
index 810c6333e0..28c2d9364b 100644
--- a/assets/themes/sport_pitches/sport_pitches.json
+++ b/assets/themes/sport_pitches/sport_pitches.json
@@ -29,16 +29,6 @@
     "de": "Ein Sportplatz ist eine Fläche, auf der Sportarten gespielt werden",
     "it": "Una campo sportivo è un’area dove vengono praticati gli sport"
   },
-  "language": [
-    "nl",
-    "fr",
-    "en",
-    "ja",
-    "zh_Hant",
-    "ru",
-    "de",
-    "it"
-  ],
   "maintainer": "",
   "icon": "./assets/layers/sport_pitch/table_tennis.svg",
   "version": "0",
diff --git a/assets/themes/street_lighting/street_lighting.json b/assets/themes/street_lighting/street_lighting.json
index 6b08322dc3..6527978e4b 100644
--- a/assets/themes/street_lighting/street_lighting.json
+++ b/assets/themes/street_lighting/street_lighting.json
@@ -2,12 +2,6 @@
   "id": "street_lighting",
   "maintainer": "Robin van der Linde",
   "version": "2021-10-22",
-  "language": [
-    "en",
-    "nl",
-    "ru",
-    "zh_Hant"
-  ],
   "title": {
     "en": "Street Lighting",
     "nl": "Straatverlichting",
diff --git a/assets/themes/street_lighting/street_lighting_assen.json b/assets/themes/street_lighting/street_lighting_assen.json
index fe515dba0c..7de7839315 100644
--- a/assets/themes/street_lighting/street_lighting_assen.json
+++ b/assets/themes/street_lighting/street_lighting_assen.json
@@ -2,10 +2,6 @@
   "id": "street_lighting_assen",
   "maintainer": "Robin van der Linde",
   "version": "2021-10-22",
-  "language": [
-    "nl",
-    "en"
-  ],
   "title": {
     "nl": "Straatverlichting - Assen"
   },
diff --git a/assets/themes/surveillance/surveillance.json b/assets/themes/surveillance/surveillance.json
index 1e460a0f7d..dd7f9da1b7 100644
--- a/assets/themes/surveillance/surveillance.json
+++ b/assets/themes/surveillance/surveillance.json
@@ -29,16 +29,6 @@
     "de": "Auf dieser offenen Karte finden Sie Überwachungskameras.",
     "it": "In questa cartina puoi trovare le telecamera di sorveglianza."
   },
-  "language": [
-    "en",
-    "nl",
-    "ja",
-    "zh_Hant",
-    "fr",
-    "de",
-    "it",
-    "pl"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/surveillance/logo.svg",
   "version": "0",
diff --git a/assets/themes/toerisme_vlaanderen/toerisme_vlaanderen.json b/assets/themes/toerisme_vlaanderen/toerisme_vlaanderen.json
index daca2042b6..81666bc417 100644
--- a/assets/themes/toerisme_vlaanderen/toerisme_vlaanderen.json
+++ b/assets/themes/toerisme_vlaanderen/toerisme_vlaanderen.json
@@ -4,10 +4,6 @@
   "maintainer": "MapComplete",
   "version": "0.0.2",
   "customCss": "./assets/themes/toerisme_vlaanderen/custom.css",
-  "language": [
-    "en",
-    "nl"
-  ],
   "mustHaveLanguage": [
     "nl"
   ],
diff --git a/assets/themes/toilets/toilets.json b/assets/themes/toilets/toilets.json
index e008133c11..2c841c8e8b 100644
--- a/assets/themes/toilets/toilets.json
+++ b/assets/themes/toilets/toilets.json
@@ -27,19 +27,6 @@
   },
   "maintainer": "MapComplete",
   "version": "2020-08-29",
-  "language": [
-    "en",
-    "de",
-    "fr",
-    "nl",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "pl",
-    "it",
-    "nb_NO",
-    "hu"
-  ],
   "startZoom": 12,
   "startLat": 51.2095,
   "startLon": 3.2222,
diff --git a/assets/themes/trees/trees.json b/assets/themes/trees/trees.json
index 46102c2585..31cabf0e7d 100644
--- a/assets/themes/trees/trees.json
+++ b/assets/themes/trees/trees.json
@@ -39,20 +39,6 @@
     "nb_NO": "Kartlegg trærne.",
     "hu": "Térképezzünk fel minden fát!"
   },
-  "language": [
-    "nl",
-    "en",
-    "fr",
-    "it",
-    "ru",
-    "ja",
-    "zh_Hant",
-    "pl",
-    "de",
-    "nb_NO",
-    "id",
-    "hu"
-  ],
   "maintainer": "Midgard",
   "icon": "./assets/themes/trees/logo.svg",
   "version": "0",
diff --git a/assets/themes/uk_addresses/uk_addresses.json b/assets/themes/uk_addresses/uk_addresses.json
index aca65e65bf..3bc4b2fead 100644
--- a/assets/themes/uk_addresses/uk_addresses.json
+++ b/assets/themes/uk_addresses/uk_addresses.json
@@ -21,16 +21,6 @@
     "it": "Contribuisci a OpenStreetMap inserendo le informazioni sull’indirizzo",
     "id": "Berkontribusi untuk OpenStreetMap dengan mengisi informasi alamat"
   },
-  "language": [
-    "en",
-    "de",
-    "it",
-    "id",
-    "nl",
-    "zh_Hant",
-    "hu",
-    "ru"
-  ],
   "maintainer": "Pieter Vander Vennet, Rob Nickerson, Russ Garrett",
   "icon": "./assets/themes/uk_addresses/housenumber_unknown.svg",
   "version": "2021-09-17",
diff --git a/assets/themes/waste_basket/waste_basket.json b/assets/themes/waste_basket/waste_basket.json
index bdbfd2df40..e30897048a 100644
--- a/assets/themes/waste_basket/waste_basket.json
+++ b/assets/themes/waste_basket/waste_basket.json
@@ -24,14 +24,6 @@
     "zh_Hant": "在這份地圖當中，你可以找到你附近的垃圾筒。如果地圖有遺漏垃圾筒，你可以自己加上去",
     "hu": "Ezen a térképen megtalálhatod a közeledben lévő szemeteskosarakat. Ha hiányzik egy kuka a térképről, te is felrajzolhatod"
   },
-  "language": [
-    "en",
-    "nl",
-    "de",
-    "it",
-    "zh_Hant",
-    "hu"
-  ],
   "maintainer": "",
   "icon": "./assets/themes/waste_basket/waste_basket.svg",
   "version": "2021-07-07",