public ILanguage AddLanguage(string textId, string name0, string name1)
{
if (LanguageIds.Ids.ContainsKey(textId))
{
throw new ArgumentException();
}
var id = LanguageIds.GetOrAddId(textId);
var language = new Language(id, textId, this, name0, name1);
Languages.Add(id, language);
return(language);
}
internal uint GetOrAddTranslationId(string textId) => TranslationIds.GetOrAddId(textId);