dont know if this fits in the category “Translation” and didnt find a similar thread.
What you think about a translate button for single toots?
There are projects like DeepL Translator which translate better than google and in a ton of languages and have some nice API.
see the existing discussion on github around this: Add Inline Translations · Issue #3783 · tootsuite/mastodon · GitHub
i will note that using the translation service you mentioned, I couldn’t find languages for most of the mastodon posts I saw in my local timeline (portugese, chinese, and japenese were not supported, although french was)