diff --git a/backend/src/services/ron/mod.rs b/backend/src/services/ron/mod.rs
index 672464e..32995b0 100644
--- a/backend/src/services/ron/mod.rs
+++ b/backend/src/services/ron/mod.rs
@@ -30,14 +30,13 @@ pub async fn set_lang(
     let mut jar = CookieJar::from_headers(&headers);
     if let Some(user) = context.user {
         connection.set_user_lang(user.id, &ron.lang).await?;
+    } else {
+        // Only set the cookie if the user is not connected.
+        let cookie = Cookie::build((consts::COOKIE_LANG_NAME, ron.lang))
+            .same_site(SameSite::Lax)
+            .path("/");
+        jar = jar.add(cookie);
     }
-
-    // Always set the cookie even is the user is connected in case of disconnection.
-    let cookie = Cookie::build((consts::COOKIE_LANG_NAME, ron.lang))
-        .same_site(SameSite::Lax)
-        .path("/");
-    jar = jar.add(cookie);
-
     Ok((jar, StatusCode::OK))
 }