LdrpGetParentLangId

NTSTATUS __stdcall LdrpGetParentLangId(UINT16 LangId, UINT16 *ParentLangId){
  UINT16 v2; 
  __int16 Name[88]; 
  __int16 ParentLanguageName[88]; 
  v2 = 0;
  if( !ParentLangId || !DownLevelLangIDToLanguageName(LangId, (PWCHAR)Name, 85i64, 2ui64) )
    return -1073741811;
  if( DownLevelGetParentLanguageName((PWCHAR)Name, (PWCHAR)ParentLanguageName) >= 2 )
    v2 = DownLevelLanguageNameToLangID((PWCHAR)ParentLanguageName, 2ui64);
  *ParentLangId = v2;
  return 0;
}

Referenced by:

LdrResFallbackLangList
LdrpSearchResourceSection_U