diff --git a/packages/element-web-module-api/package.json b/packages/element-web-module-api/package.json
index d817ca4936..7898159820 100644
--- a/packages/element-web-module-api/package.json
+++ b/packages/element-web-module-api/package.json
@@ -18,22 +18,28 @@
         "lint:ts": "tsc --noEmit"
     },
     "devDependencies": {
+        "@matrix-org/react-sdk-module-api": "^2.5.0",
         "@types/node": "^22.10.7",
         "@types/semver": "^7.5.8",
+        "matrix-web-i18n": "^3.3.0",
         "semver": "^7.6.3",
         "typescript": "^5.7.3",
         "vite": "^6.0.11",
         "vite-plugin-dts": "^4.5.0"
     },
     "peerDependencies": {
-        "@matrix-org/react-sdk-module-api": "^2.5.0",
+        "@matrix-org/react-sdk-module-api": "*",
         "@types/react": "*",
         "@types/react-dom": "*",
+        "matrix-web-i18n": "*",
         "react": "^18"
     },
     "peerDependenciesMeta": {
         "@matrix-org/react-sdk-module-api": {
             "optional": true
+        },
+        "matrix-web-i18n": {
+            "optional": true
         }
     }
 }
diff --git a/packages/element-web-module-api/src/api.ts b/packages/element-web-module-api/src/api.ts
index 73d1e23535..b016b796c9 100644
--- a/packages/element-web-module-api/src/api.ts
+++ b/packages/element-web-module-api/src/api.ts
@@ -37,7 +37,7 @@ const moduleExportSignature: Record<keyof ModuleExport, Type> = {
 
 type Type = "function" | "string" | "number" | "boolean" | "object";
 
-export function isInterface<T>(obj: unknown, keys: Record<keyof T, Type>): obj is T {
+function isInterface<T>(obj: unknown, keys: Record<keyof T, Type>): obj is T {
     if (obj === null || typeof obj !== "object") return false;
     for (const key in keys) {
         if (typeof (obj as Record<keyof T, unknown>)[key] !== keys[key]) return false;
diff --git a/packages/element-web-module-api/src/index.ts b/packages/element-web-module-api/src/index.ts
index c739e9d24c..d105ffdb8a 100644
--- a/packages/element-web-module-api/src/index.ts
+++ b/packages/element-web-module-api/src/index.ts
@@ -5,7 +5,7 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE files in the repository root for full details.
 */
 
-export { ModuleLoader } from "./loader";
+export { ModuleLoader, ModuleIncompatibleError } from "./loader";
 export type { Api, Module, ModuleFactory } from "./api";
 export type * from "./legacy-modules";
 export type * from "./legacy-customisations";