Hey there, thanks for the suggestion! We’re slowly adding in account settings (settings that sync up with your lemmy account) on a case by case basis. Right now, this only includes user/community blocking and instance blocking (coming in Lemmy 0.19.x) If you’d like, feel free to open up a new issue on GitHub for language selections and we’ll see what we can do!
For other settings not available in Thunder at this time, you can go to the web UI and adjust those settings there (and they should generally apply in Thunder as well)