diff --git a/apps/client/src/widgets/type_widgets/MindMap.tsx b/apps/client/src/widgets/type_widgets/MindMap.tsx
index 715612947..b4ccdf371 100644
--- a/apps/client/src/widgets/type_widgets/MindMap.tsx
+++ b/apps/client/src/widgets/type_widgets/MindMap.tsx
@@ -136,7 +136,7 @@ function MindElixir({ containerRef: externalContainerRef, containerProps, apiRef
 
         const mind = new VanillaMindElixir({
             el: containerRef.current,
-            locale: LOCALE_MAPPINGS[locale],
+            locale: LOCALE_MAPPINGS[locale as DISPLAYABLE_LOCALE_IDS] ?? undefined,
             editable
         });
 
diff --git a/apps/client/src/widgets/type_widgets/canvas/Canvas.tsx b/apps/client/src/widgets/type_widgets/canvas/Canvas.tsx
index fb5cc1df5..6a5ea9377 100644
--- a/apps/client/src/widgets/type_widgets/canvas/Canvas.tsx
+++ b/apps/client/src/widgets/type_widgets/canvas/Canvas.tsx
@@ -10,6 +10,7 @@ import { NonDeletedExcalidrawElement } from "@excalidraw/excalidraw/element/type
 import { goToLinkExt } from "../../../services/link";
 import useCanvasPersistence from "./persistence";
 import { LANGUAGE_MAPPINGS } from "./i18n";
+import { DISPLAYABLE_LOCALE_IDS } from "@triliumnext/commons";
 
 // currently required by excalidraw, in order to allows self-hosting fonts locally.
 // this avoids making excalidraw load the fonts from an external CDN.
@@ -60,7 +61,7 @@ export default function Canvas({ note, noteContext }: TypeWidgetProps) {
                     detectScroll={false}
                     handleKeyboardGlobally={false}
                     autoFocus={false}
-                    langCode={LANGUAGE_MAPPINGS[locale]}
+                    langCode={LANGUAGE_MAPPINGS[locale as DISPLAYABLE_LOCALE_IDS] ?? undefined}
                     UIOptions={{
                         canvasActions: {
                             saveToActiveFile: false,
diff --git a/docs/Developer Guide/Developer Guide/Concepts/Internationalisation  Translat.md b/docs/Developer Guide/Developer Guide/Concepts/Internationalisation  Translat.md
index 2449b6c72..f420ff7ad 100644
--- a/docs/Developer Guide/Developer Guide/Concepts/Internationalisation  Translat.md	
+++ b/docs/Developer Guide/Developer Guide/Concepts/Internationalisation  Translat.md	
@@ -15,7 +15,7 @@ One important aspect is the fact that we are using a key-based approach. This me
 
 The key-based approach allows a hierarchical structure. For example, a key of `about.title` would be added in `translation.json` as follows:
 
-```
+```json
 {
 	"about": {
 		"title": "About Trilium Notes"