diff --git a/frontend/src/lib/i18n/en.ts b/frontend/src/lib/i18n/en.ts
index ef34622..6a435c0 100644
--- a/frontend/src/lib/i18n/en.ts
+++ b/frontend/src/lib/i18n/en.ts
@@ -1,3 +1,5 @@
+// The lang_switch value shows the label of the OTHER language (so when EN is
+// active the button offers to switch to FR).
 export default {
   title: 'Skilluv starter — fullstack Rust',
   tagline: 'Rust + Axum backend, SvelteKit frontend, PostgreSQL, ready to hack.',
diff --git a/frontend/src/lib/i18n/fr.ts b/frontend/src/lib/i18n/fr.ts
index cbfe134..6f50318 100644
--- a/frontend/src/lib/i18n/fr.ts
+++ b/frontend/src/lib/i18n/fr.ts
@@ -7,5 +7,5 @@ export default {
   notes_placeholder: 'Écris une note…',
   notes_add: 'Ajouter',
   notes_empty: 'Aucune note pour le moment.',
-  lang_switch: 'EN'
+  lang_switch: 'EN' // shows label of OTHER lang
 } as const;
diff --git a/frontend/src/lib/i18n/index.svelte.ts b/frontend/src/lib/i18n/index.svelte.ts
index f84220d..ee9d25e 100644
--- a/frontend/src/lib/i18n/index.svelte.ts
+++ b/frontend/src/lib/i18n/index.svelte.ts
@@ -6,9 +6,9 @@ export const dictionaries = { en, fr } as const;
 export type Dict = typeof en;
 
 class LangState {
-  current = $state<Lang>('fr');
+  current = $state<Lang>('en');
   toggle() {
-    this.current = this.current === 'fr' ? 'en' : 'fr';
+    this.current = this.current === 'en' ? 'fr' : 'en';
   }
   get t(): Dict {
     return dictionaries[this.current];