if you don’t want to feed your texts to the corpus for ai training, you better go live in a forest, because anything appearing on the internet inevitably ends up in the training corpus.

If your distaste is particularly about translation apps, then you can selfhost an llm even on your phone, and use it for translation. Even a really small one would be ok, as LLMs are designed primarily for tasks like these, even tho everyone seems to forget this.