diff --git a/Models/ThemeConfig/Conversion/PrepareLayer.ts b/Models/ThemeConfig/Conversion/PrepareLayer.ts
index ab5f1578e1..649bb672c5 100644
--- a/Models/ThemeConfig/Conversion/PrepareLayer.ts
+++ b/Models/ThemeConfig/Conversion/PrepareLayer.ts
@@ -366,7 +366,7 @@ export class RewriteSpecial extends DesugaringStep<TagRenderingConfigJson> {
      * // should warn for unexpected keys
      * const errors = []
      * RewriteSpecial.convertIfNeeded({"special": {type: "image_carousel"}, "en": "xyz"}, errors, "test") // =>  {'*': "{image_carousel()}"}
-     * errors // => ["At test: Unexpected key in a special block: en"]
+     * errors // => ["The only keys allowed next to a 'special'-block are 'before' and 'after'. Perhaps you meant to put 'en' into the special block?"]
      *
      * // should give an error on unknown visualisations
      * const errors = []
@@ -378,24 +378,25 @@ export class RewriteSpecial extends DesugaringStep<TagRenderingConfigJson> {
      * const errors = []
      * RewriteSpecial.convertIfNeeded({"special": {}}, errors, "test") // => undefined
      * errors // => ["A 'special'-block should define 'type' to indicate which visualisation should be used"]
-     * 
-     * 
+     *
+     *
      * // an actual test
-     * const special = {"special": {
-     *           "type": "multi",
-     *           "before": {
+     * const special = {
+     *     "before": {
      *             "en": "<h3>Entrances</h3>This building has {_entrances_count} entrances:"
      *           },
-     *           "after": {
+     *     "after": {
      *             "en": "{_entrances_count_without_width_count} entrances don't have width information yet"
      *           },
+     *     "special": {
+     *           "type": "multi",
      *           "key": "_entrance_properties_with_width",
      *           "tagrendering": {
      *             "en": "An <a href='#{id}'>entrance</a> of {canonical(width)}"
      *           }
      *         }}
      * const errors = []
-     * RewriteSpecial.convertIfNeeded(special, errors, "test") // => {"en": "<h3>Entrances</h3>This building has {_entrances_count} entrances: {multi(_entrance_properties_with_width,An <a href='#&LBRACEid&RBRACE'>entrance</a> of &LBRACEcanonical&LPARENSwidth&RPARENS&RBRACE)}An <a href='#{id}'>entrance</a> of {canonical(width)}"}
+     * RewriteSpecial.convertIfNeeded(special, errors, "test") // => {"en": "<h3>Entrances</h3>This building has {_entrances_count} entrances:{multi(_entrance_properties_with_width,An <a href='#&LBRACEid&RBRACE'>entrance</a> of &LBRACEcanonical&LPARENSwidth&RPARENS&RBRACE)}{_entrances_count_without_width_count} entrances don't have width information yet"}
      * errors // => []
      */
     private static convertIfNeeded(input: (object & { special: { type: string } }) | any, errors: string[], context: string): any {
@@ -409,12 +410,18 @@ export class RewriteSpecial extends DesugaringStep<TagRenderingConfigJson> {
             errors.push("A 'special'-block should define 'type' to indicate which visualisation should be used")
             return undefined
         }
+
         const vis = SpecialVisualizations.specialVisualizations.find(sp => sp.funcName === type)
         if (vis === undefined) {
             const options = Utils.sortedByLevenshteinDistance(type, SpecialVisualizations.specialVisualizations, sp => sp.funcName)
             errors.push(`Special visualisation '${type}' not found. Did you perhaps mean ${options[0].funcName}, ${options[1].funcName} or ${options[2].funcName}?\n\tFor all known special visualisations, please see https://github.com/pietervdvn/MapComplete/blob/develop/Docs/SpecialRenderings.md`)
             return undefined
         }
+        errors.push(...
+            Array.from(Object.keys(input)).filter(k => k !== "special" && k !== "before" && k !== "after")
+                .map(k => {
+                    return `The only keys allowed next to a 'special'-block are 'before' and 'after'. Perhaps you meant to put '${k}' into the special block?`;
+                }))
 
         const argNamesList = vis.args.map(a => a.name)
         const argNames = new Set<string>(argNamesList)
@@ -471,20 +478,20 @@ export class RewriteSpecial extends DesugaringStep<TagRenderingConfigJson> {
         for (const ln of languages) {
             const args = []
             for (const argName of argNamesList) {
-                const v = special[argName] ?? ""
+                let v = special[argName] ?? ""
                 if (Translations.isProbablyATranslation(v)) {
-                    const txt = new Translation(v).textFor(ln)
-                        .replace(/,/g, "&COMMA")
-                        .replace(/\{/g, "&LBRACE")
-                        .replace(/}/g, "&RBRACE")
-                    ;
-                    args.push(txt)
-                } else if (typeof v === "string") {
+                   v = new Translation(v).textFor(ln)
+                    
+                } 
+                
+                if (typeof v === "string") {
                     const txt = v.replace(/,/g, "&COMMA")
                         .replace(/\{/g, "&LBRACE")
                         .replace(/}/g, "&RBRACE")
+                        .replace(/\(/g, "&LPARENS")
+                        .replace(/\)/g, '&RPARENS')
                     args.push(txt)
-                } else if(typeof v === "object"){
+                } else if (typeof v === "object") {
                     args.push(JSON.stringify(v))
                 } else {
                     args.push(v)
@@ -518,7 +525,7 @@ export class RewriteSpecial extends DesugaringStep<TagRenderingConfigJson> {
      * const result = new RewriteSpecial().convert(tr,"test").result
      * const expected = {render:  {'en': "Some introduction{image_carousel(image)}"}}
      * result // => expected
-     * 
+     *
      * // Should put text after if specified
      * const tr = {
      *     render: {special: {type: "image_carousel", image_key: "image"}, after: {en: "Some footer"} },