diff --git a/src/frontend/locale/langs.cpp b/src/frontend/locale/langs.cpp
index 762e27566..d703cbb4c 100644
--- a/src/frontend/locale/langs.cpp
+++ b/src/frontend/locale/langs.cpp
@@ -120,15 +120,20 @@ void langs::load(const path& resdir,
                  const vector<ContentPack>& packs) {
     unique_ptr<Lang> lang (new Lang(locale));
     load(resdir, fallback, packs, *lang.get());
-    load(resdir, locale, packs, *lang.get());
+    if (locale != fallback) {
+        load(resdir, locale, packs, *lang.get());
+    }
     current.reset(lang.release());
 }
 
 void langs::setup(const path& resdir,
-                  const string& locale,
+                  string locale,
                   const vector<ContentPack>& packs) {
     string fallback = langs::FALLBACK_DEFAULT;
     langs::loadLocalesInfo(resdir, fallback);
+    if (langs::locales_info.find(locale) == langs::locales_info.end()) {
+        locale = fallback;
+    }
     langs::load(resdir, locale, fallback, packs);
 }
 
diff --git a/src/frontend/locale/langs.h b/src/frontend/locale/langs.h
index 7f6d916c2..0e48a8399 100644
--- a/src/frontend/locale/langs.h
+++ b/src/frontend/locale/langs.h
@@ -62,7 +62,7 @@ namespace langs {
                                    const std::wstring& context);
 
     extern void setup(const std::filesystem::path& resdir,
-                      const std::string& locale,
+                      std::string locale,
                       const std::vector<ContentPack>& packs);
 }