fix: Set detected language on first login, remove auto-detect language option

client/src/sagas/core/services/core.js

@@ -79,14 +79,8 @@ export function* initializeCore() {
 }
 
 export function* changeCoreLanguage(language) {
-  if (language === null) {
-    yield call(i18n.detectLanguage);
-    yield call(i18n.loadCoreLocale);
-    yield call(i18n.changeLanguage, i18n.resolvedLanguage);
-  } else {
-    yield call(i18n.loadCoreLocale, language);
-    yield call(i18n.changeLanguage, language);
-  }
+  yield call(i18n.loadCoreLocale, language);
+  yield call(i18n.changeLanguage, language);
 }
 
 export function* toggleFavorites(isEnabled) {

client/src/sagas/login/services/login.js

@@ -140,6 +140,7 @@ export function* acceptTerms(signature) {
     ({ item: accessToken } = yield call(api.acceptTerms, {
       pendingToken,
       signature,
+      initialLanguage: i18n.resolvedLanguage,
     }));
   } catch (error) {
     yield put(actions.acceptTerms.failure(error));