diff --git a/packages/element-web-module-api/element-web-module-api.api.md b/packages/element-web-module-api/element-web-module-api.api.md
index d7590281ea..f0d04c4df6 100644
--- a/packages/element-web-module-api/element-web-module-api.api.md
+++ b/packages/element-web-module-api/element-web-module-api.api.md
@@ -174,10 +174,10 @@ export interface ExtrasApi {
 
 // @public
 export interface I18nApi {
-    humanizeTime(timeMillis: number): string;
+    humanizeTime(this: void, timeMillis: number): string;
     get language(): string;
-    register(translations: Partial<Translations>): void;
-    translate(key: keyof Translations, variables?: Variables): string;
+    register(this: void, translations: Partial<Translations>): void;
+    translate(this: void, key: keyof Translations, variables?: Variables): string;
 }
 
 // @alpha @deprecated (undocumented)
@@ -445,3 +445,4 @@ export interface WidgetVariablesCustomisations {
 // (No @packageDocumentation comment for this package)
 
 ```
+
diff --git a/packages/element-web-module-api/package.json b/packages/element-web-module-api/package.json
index 7357a22773..6e63a29d64 100644
--- a/packages/element-web-module-api/package.json
+++ b/packages/element-web-module-api/package.json
@@ -1,7 +1,7 @@
 {
     "name": "@element-hq/element-web-module-api",
     "type": "module",
-    "version": "1.9.0",
+    "version": "1.9.1",
     "description": "Module API surface for element-web",
     "repository": {
         "type": "git",
diff --git a/packages/element-web-module-api/src/api/i18n.ts b/packages/element-web-module-api/src/api/i18n.ts
index 1e8ac2f64a..564390c7f0 100644
--- a/packages/element-web-module-api/src/api/i18n.ts
+++ b/packages/element-web-module-api/src/api/i18n.ts
@@ -41,19 +41,19 @@ export interface I18nApi {
     /**
      * Register translations for the module, may override app's existing translations
      */
-    register(translations: Partial<Translations>): void;
+    register(this: void, translations: Partial<Translations>): void;
 
     /**
      * Perform a translation, with optional variables
      * @param key - The key to translate
      * @param variables - Optional variables to interpolate into the translation
      */
-    translate(key: keyof Translations, variables?: Variables): string;
+    translate(this: void, key: keyof Translations, variables?: Variables): string;
 
     /**
      * Convert a timestamp into a translated, human-readable time,
      * using the current system time as a reference, eg. "5 minutes ago".
      * @param timeMillis - The time in milliseconds since epoch
      */
-    humanizeTime(timeMillis: number): string;
+    humanizeTime(this: void, timeMillis: number): string;
 }