diff --git a/Models/ThemeConfig/Conversion/Validation.ts b/Models/ThemeConfig/Conversion/Validation.ts
index 916c9b7814..a1e5bf889f 100644
--- a/Models/ThemeConfig/Conversion/Validation.ts
+++ b/Models/ThemeConfig/Conversion/Validation.ts
@@ -163,10 +163,19 @@ class ValidateTheme extends DesugaringStep<LayoutConfigJson> {
                 errors.push(...checked.errors)
             }
             if (!json.hideFromOverview && theme.id !== "personal") {
+
+                // The first key in the the title-field must be english, otherwise the title in the loading page will be the different language
+                const targetLanguage = theme.title.SupportedLanguages()[0]
+                if(targetLanguage !== "en"){
+                    warnings.push(`TargetLanguage is not 'en' for public theme ${theme.id}, it is ${targetLanguage}. Move 'en' up in the title of the theme and set it as the first key`)
+                }
+                
                 // Official, public themes must have a full english translation
                 const checked = new ValidateLanguageCompleteness("en")
                     .convert(theme, theme.id)
                 errors.push(...checked.errors)
+                
+              
             }
 
         } catch (e) {
diff --git a/assets/layers/food/food.json b/assets/layers/food/food.json
index 85190394c4..9c4bfd2f29 100644
--- a/assets/layers/food/food.json
+++ b/assets/layers/food/food.json
@@ -1,8 +1,8 @@
 {
   "id": "food",
   "name": {
-    "nl": "Eetgelegenheden",
     "en": "Restaurants and fast food",
+    "nl": "Eetgelegenheden",
     "de": "Restaurants und Imbisse",
     "da": "Restauranter og fastfood",
     "es": "Restaurantes y comida rápida"
diff --git a/assets/layers/maxspeed/maxspeed.json b/assets/layers/maxspeed/maxspeed.json
index de44ecf6a9..96a9c30c93 100644
--- a/assets/layers/maxspeed/maxspeed.json
+++ b/assets/layers/maxspeed/maxspeed.json
@@ -1,9 +1,9 @@
 {
   "id": "maxspeed",
   "name": {
+    "en": "Maxspeed",
     "es": "Velocidad",
-    "ca": "Velocitat",
-    "en": "Maxspeed"
+    "ca": "Velocitat"
   },
   "source": {
     "osmTags": {
diff --git a/assets/layers/playground/playground.json b/assets/layers/playground/playground.json
index d4e6c77e71..5334088cb5 100644
--- a/assets/layers/playground/playground.json
+++ b/assets/layers/playground/playground.json
@@ -1,8 +1,8 @@
 {
   "id": "playground",
   "name": {
-    "nl": "Speeltuinen",
     "en": "Playgrounds",
+    "nl": "Speeltuinen",
     "ru": "Детские площадки",
     "de": "Spielplätze",
     "it": "Campi da gioco",
diff --git a/assets/themes/cafes_and_pubs/cafes_and_pubs.json b/assets/themes/cafes_and_pubs/cafes_and_pubs.json
index 2d44d22378..8d018ccf77 100644
--- a/assets/themes/cafes_and_pubs/cafes_and_pubs.json
+++ b/assets/themes/cafes_and_pubs/cafes_and_pubs.json
@@ -1,8 +1,8 @@
 {
   "id": "cafes_and_pubs",
   "title": {
-    "nl": "Cafés",
     "en": "Cafés and pubs",
+    "nl": "Cafés",
     "de": "Cafés und Kneipen",
     "it": "Caffè e pub",
     "nb_NO": "Kafeer og kneiper",
diff --git a/assets/themes/climbing/climbing.json b/assets/themes/climbing/climbing.json
index a60a2a80b3..4160a477ba 100644
--- a/assets/themes/climbing/climbing.json
+++ b/assets/themes/climbing/climbing.json
@@ -1,9 +1,9 @@
 {
   "id": "climbing",
   "title": {
+    "en": "Open Climbing Map",
     "nl": "Open klimkaart",
     "de": "Offene Kletterkarte",
-    "en": "Open Climbing Map",
     "ru": "Открытая карта скалолазания",
     "ja": "登山地図を開く",
     "zh_Hant": "開放攀爬地圖",
diff --git a/assets/themes/cyclestreets/cyclestreets.json b/assets/themes/cyclestreets/cyclestreets.json
index 955cf20a09..c896b08e94 100644
--- a/assets/themes/cyclestreets/cyclestreets.json
+++ b/assets/themes/cyclestreets/cyclestreets.json
@@ -2,8 +2,8 @@
   "id": "cyclestreets",
   "version": "2020-08-30",
   "title": {
-    "nl": "Fietsstraten",
     "en": "Cyclestreets",
+    "nl": "Fietsstraten",
     "ja": "Cyclestreets",
     "zh_Hant": "單車街道",
     "de": "Fahrradstraßen",
diff --git a/assets/themes/facadegardens/facadegardens.json b/assets/themes/facadegardens/facadegardens.json
index d1d8780e4a..ed2d1f51e1 100644
--- a/assets/themes/facadegardens/facadegardens.json
+++ b/assets/themes/facadegardens/facadegardens.json
@@ -1,8 +1,8 @@
 {
   "id": "facadegardens",
   "title": {
-    "nl": "Straatgeveltuintjes",
     "en": "Facade gardens",
+    "nl": "Straatgeveltuintjes",
     "ja": "ファサード庭園",
     "zh_Hant": "立面花園",
     "it": "Giardini verticali",
diff --git a/assets/themes/food/food.json b/assets/themes/food/food.json
index b49c9b71d8..ec3d0a2556 100644
--- a/assets/themes/food/food.json
+++ b/assets/themes/food/food.json
@@ -1,8 +1,8 @@
 {
   "id": "food",
   "title": {
-    "nl": "Eetgelegenheden",
     "en": "Restaurants and fast food",
+    "nl": "Eetgelegenheden",
     "de": "Restaurants und Schnellimbisse",
     "it": "Ristoranti e fast food",
     "nb_NO": "Restauranter og søppelmat",
diff --git a/assets/themes/fritures/fritures.json b/assets/themes/fritures/fritures.json
index d6b46e2106..e4db8ef2fe 100644
--- a/assets/themes/fritures/fritures.json
+++ b/assets/themes/fritures/fritures.json
@@ -1,8 +1,8 @@
 {
   "id": "fritures",
   "title": {
-    "nl": "Friturenkaart",
     "en": "Fries shops",
+    "nl": "Friturenkaart",
     "fr": "Carte des friteries",
     "de": "Pommes-frites-Läden",
     "ca": "Botigues de patates"
diff --git a/assets/themes/mapcomplete-changes/mapcomplete-changes.json b/assets/themes/mapcomplete-changes/mapcomplete-changes.json
index c909ddf2e6..996bd4deb4 100644
--- a/assets/themes/mapcomplete-changes/mapcomplete-changes.json
+++ b/assets/themes/mapcomplete-changes/mapcomplete-changes.json
@@ -1,24 +1,13 @@
 {
   "id": "mapcomplete-changes",
   "title": {
-    "en": "Changes made with MapComplete",
-    "de": "Änderungen mit MapComplete",
-    "es": "Cambios hechos con MapComplete",
-    "nb_NO": "Endringer utført med MapComplete",
-    "nl": "Wijzigingen gemaakt met MapComplete"
+    "en": "Changes made with MapComplete"
   },
   "shortDescription": {
-    "en": "Shows changes made by MapComplete",
-    "de": "Zeigt Änderungen von MapComplete",
-    "es": "Muestra los cambios hechos por MapComplete",
-    "nb_NO": "Vis endringer utført med MapComplete",
-    "nl": "Toont wijzigingen gemaakt met MapComplete"
+    "en": "Shows changes made by MapComplete"
   },
   "description": {
-    "en": "This maps shows all the changes made with MapComplete",
-    "de": "Diese Karte zeigt alle Änderungen die mit MapComplete gemacht wurden",
-    "es": "Este mapa muestra todos los cambios hechos con MapComplete",
-    "nl": "Deze kaart toont alle wijzigingen die met MapComplete werden gemaakt"
+    "en": "This maps shows all the changes made with MapComplete"
   },
   "maintainer": "",
   "icon": "./assets/svg/logo.svg",
@@ -33,10 +22,7 @@
     {
       "id": "mapcomplete-changes",
       "name": {
-        "en": "Changeset centers",
-        "de": "Schwerpunkte von Änderungssätzen",
-        "es": "Centros de conjuntos de cambios",
-        "nb_NO": "Endringssettsenter"
+        "en": "Changeset centers"
       },
       "minzoom": 0,
       "source": {
@@ -50,55 +36,35 @@
       ],
       "title": {
         "render": {
-          "en": "Changeset for {theme}",
-          "de": "Änderungen für {theme}",
-          "es": "Conjunto de cambios para {theme}",
-          "nb_NO": "Endringssett for {theme}",
-          "nl": "Wijzigingset voor {theme}"
+          "en": "Changeset for {theme}"
         }
       },
       "description": {
-        "en": "Shows all MapComplete changes",
-        "de": "Zeigt alle MapComplete Änderungen",
-        "es": "Muestra todos los cambios de MapComplete",
-        "nl": "Toont alle wijzigingen met MapComplete"
+        "en": "Shows all MapComplete changes"
       },
       "tagRenderings": [
         {
           "id": "render_id",
           "render": {
-            "en": "Changeset <a href='https://openstreetmap.org/changeset/{id}' target='_blank'>{id}</a>",
-            "de": "Änderung <a href='https://openstreetmap.org/changeset/{id}' target='_blank'>{id}</a>",
-            "es": "Conjunto de cambios <a href='https://openstreetmap.org/changeset/{id}' target='_blank'>{id}</a>",
-            "nb_NO": "Endringssett <a href='https://openstreetmap.org/changeset/{id}' target='_blank'>{id}</a>",
-            "nl": "Wijzigingset <a href='https://openstreetmap.org/changeset/{id}' target='_blank'>{id}</a>"
+            "en": "Changeset <a href='https://openstreetmap.org/changeset/{id}' target='_blank'>{id}</a>"
           }
         },
         {
           "id": "contributor",
           "render": {
-            "en": "Change made by <a href='https://openstreetmap.org/user/{_last_edit:contributor}' target='_blank'>{_last_edit:contributor}</a>",
-            "de": "Änderung wurde von <a href='https://openstreetmap.org/user/{_last_edit:contributor}' target='_blank'>{_last_edit:contributor}</a> gemacht",
-            "es": "Cambio hecho por <a href='https://openstreetmap.org/user/{_last_edit:contributor}' target='_blank'>{_last_edit:contributor}</a>",
-            "nl": "Wijziging gemaakt door <a href='https://openstreetmap.org/user/{_last_edit:contributor}' target='_blank'>{_last_edit:contributor}</a>"
+            "en": "Change made by <a href='https://openstreetmap.org/user/{_last_edit:contributor}' target='_blank'>{_last_edit:contributor}</a>"
           }
         },
         {
           "id": "theme",
           "render": {
-            "en": "Change with theme <a href='https://mapcomplete.osm.be/{theme}'>{theme}</a>",
-            "de": "Änderung mit Thema <a href='https://mapcomplete.osm.be/{theme}'>{theme}</a>",
-            "es": "Cambio con tema <a href='https://mapcomplete.osm.be/{theme}'>{theme}</a>",
-            "nl": "Wijziging met thema <a href='https://mapcomplete.osm.be/{theme}'>{theme}</a>"
+            "en": "Change with theme <a href='https://mapcomplete.osm.be/{theme}'>{theme}</a>"
           },
           "mappings": [
             {
               "if": "theme~http.*",
               "then": {
-                "en": "Change with <b>unofficial</b> theme <a href='https://mapcomplete.osm.be/theme.html?userlayout={theme}'>{theme}</a>",
-                "de": "Änderung mit <b>inoffiziellem</b> Thema <a href='https://mapcomplete.osm.be/theme.html?userlayout={theme}'>{theme}</a>",
-                "es": "Cambio con tema <b>no oficial</b> <a href='https://mapcomplete.osm.be/theme.html?userlayout={theme}'>{theme}</a>",
-                "nl": "Wijziging met <b>officieus</b> thema <a href='https://mapcomplete.osm.be/theme.html?userlayout={theme}'>{theme}</a>"
+                "en": "Change with <b>unofficial</b> theme <a href='https://mapcomplete.osm.be/theme.html?userlayout={theme}'>{theme}</a>"
               }
             }
           ]
@@ -374,11 +340,7 @@
                 }
               ],
               "question": {
-                "en": "Themename contains {search}",
-                "de": "Themenname enthält {search}",
-                "es": "Nombre del tema contiene {search}",
-                "nb_NO": "Temanavn inneholder {search}",
-                "nl": "Themanaam bevat {search}"
+                "en": "Themename contains {search}"
               }
             }
           ]
@@ -394,10 +356,7 @@
                 }
               ],
               "question": {
-                "en": "Made by contributor {search}",
-                "de": "Erstellt von {search}",
-                "es": "Hecho por contributor/a {search}",
-                "nl": "Gemaakt door bijdrager {search}"
+                "en": "Made by contributor {search}"
               }
             }
           ]
@@ -413,10 +372,7 @@
                 }
               ],
               "question": {
-                "en": "<b>Not</b> made by contributor {search}",
-                "de": "<b>Nicht</b> erstellt von {search}",
-                "es": "<b>No</b> hecho por contributor/a {search}",
-                "nl": "<b>Niet</b> gemaakt door bijdrager {search}"
+                "en": "<b>Not</b> made by contributor {search}"
               }
             }
           ]
@@ -431,10 +387,7 @@
           {
             "id": "link_to_more",
             "render": {
-              "en": "More statistics can be found <a href='https://github.com/pietervdvn/MapComplete/tree/develop/Docs/Tools/graphs' target='_blank'>here</a>",
-              "de": "Weitere Statistiken finden Sie <a href='https://github.com/pietervdvn/MapComplete/tree/develop/Docs/Tools/graphs' target='_blank'>hier</a>",
-              "es": "Se pueden encontrar más estadísticas <a href='https://github.com/pietervdvn/MapComplete/tree/develop/Docs/Tools/graphs' target='_blank'>aquí</a>",
-              "nl": "Meer statistieken kunnen <a href='https://github.com/pietervdvn/MapComplete/tree/develop/Docs/Tools/graphs' target='_blank'>hier</a> gevonden worden"
+              "en": "More statistics can be found <a href='https://github.com/pietervdvn/MapComplete/tree/develop/Docs/Tools/graphs' target='_blank'>here</a>"
             }
           },
           {
diff --git a/assets/themes/maxspeed/maxspeed.json b/assets/themes/maxspeed/maxspeed.json
index 9b7edbf3a1..1d08e627db 100644
--- a/assets/themes/maxspeed/maxspeed.json
+++ b/assets/themes/maxspeed/maxspeed.json
@@ -1,9 +1,9 @@
 {
   "id": "maxspeed",
   "title": {
+    "en": "Maxspeed",
     "es": "Velocidad",
-    "ca": "Velocitat",
-    "en": "Maxspeed"
+    "ca": "Velocitat"
   },
   "shortDescription": {
     "en": "This map shows the legally allowed maximum speed on every road."
diff --git a/assets/themes/parkings/parkings.json b/assets/themes/parkings/parkings.json
index 1a09bd0bbf..ae5caab1cd 100644
--- a/assets/themes/parkings/parkings.json
+++ b/assets/themes/parkings/parkings.json
@@ -1,8 +1,8 @@
 {
   "id": "parkings",
   "title": {
-    "nl": "Parking",
     "en": "Parking",
+    "nl": "Parking",
     "de": "Parkplatzkarte",
     "it": "Parcheggio",
     "nb_NO": "Parkering",
diff --git a/assets/themes/playgrounds/playgrounds.json b/assets/themes/playgrounds/playgrounds.json
index 7c0ca27dfa..064027389d 100644
--- a/assets/themes/playgrounds/playgrounds.json
+++ b/assets/themes/playgrounds/playgrounds.json
@@ -1,8 +1,8 @@
 {
   "id": "playgrounds",
   "title": {
-    "nl": "Speelplekken",
     "en": "Playgrounds",
+    "nl": "Speelplekken",
     "fr": "Aires de jeux",
     "ja": "遊び場",
     "zh_Hant": "遊樂場",
diff --git a/assets/themes/sport_pitches/sport_pitches.json b/assets/themes/sport_pitches/sport_pitches.json
index 023f28af70..d2b7b4809d 100644
--- a/assets/themes/sport_pitches/sport_pitches.json
+++ b/assets/themes/sport_pitches/sport_pitches.json
@@ -1,9 +1,9 @@
 {
   "id": "sport_pitches",
   "title": {
+    "en": "Sport pitches",
     "nl": "Sportvelden",
     "fr": "Terrains de sport",
-    "en": "Sport pitches",
     "ja": "スポーツ競技場",
     "zh_Hant": "運動場地",
     "ru": "Спортивные площадки",
diff --git a/assets/themes/trees/trees.json b/assets/themes/trees/trees.json
index 393e0cadb1..0ba47ea1ff 100644
--- a/assets/themes/trees/trees.json
+++ b/assets/themes/trees/trees.json
@@ -1,8 +1,8 @@
 {
   "id": "trees",
   "title": {
-    "nl": "Bomen",
     "en": "Trees",
+    "nl": "Bomen",
     "fr": "Arbres",
     "it": "Alberi",
     "ru": "Деревья",
diff --git a/scripts/generateLayerOverview.ts b/scripts/generateLayerOverview.ts
index a87b3ade51..81a67a69a5 100644
--- a/scripts/generateLayerOverview.ts
+++ b/scripts/generateLayerOverview.ts
@@ -19,7 +19,6 @@ import {PrepareLayer} from "../Models/ThemeConfig/Conversion/PrepareLayer";
 import {PrepareTheme} from "../Models/ThemeConfig/Conversion/PrepareTheme";
 import {DesugaringContext} from "../Models/ThemeConfig/Conversion/Conversion";
 import {Utils} from "../Utils";
-import {And} from "../Logic/Tags/And";
 
 // This scripts scans 'assets/layers/*.json' for layer definition files and 'assets/themes/*.json' for theme definition files.
 // It spits out an overview of those to be used to load them
@@ -262,6 +261,7 @@ class LayerOverviewUtils {
             tagRenderings: this.getSharedTagRenderings(knownImagePaths),
             publicLayers
         }
+        const nonDefaultLanguages : {theme: string, language: string}[] = []
         for (const themeInfo of themeFiles) {
             let themeFile = themeInfo.parsed
             const themePath = themeInfo.path