@Deadsoon, no i dont have a swedish patch for the game running
But i think it could be possible to make one for it since basically all translation strings are on the esoui git for both in game localization and internal-ingame localization. Is it possible to use a custom language.X code for the cvar?
/script d(GetCVar("language.2")) returns "en" so the client is indeed in english, but the addon menu and its settings, prints etc could use swedish with the translation you have?
If you check my post again i added the complete translation for the list you provided.