Move LocalizedValue and add get_language_codes

localized_fields/util.py

@@ -0,0 +1,21 @@
+from typing import List
+
+from django.conf import settings
+
+
+def get_language_codes() -> List[str]:
+    """Gets a list of all available language codes.
+
+    This looks at your project's settings.LANGUAGES
+    and returns a flat list of the configured
+    language codes.
+
+    Arguments:
+        A flat list of all availble language codes
+        in your project.
+    """
+
+    return [
+        lang_code
+        for lang_code, _ in settings.LANGUAGES
+    ]