Many only support a few languages.

For a direct answer, I recommend using language models that are free from advertisers, trends, and SEO trash (maybe for now).

privacy.resistFingerprinting Turning it on provides privacy, yes, but it makes it unusable to use dark mode or even the “Dark Reader” addon.

My advice to you is not to overdo the secrecy, it should not be a problem for the people you do business with to see your face.