There’s also a bug here for me too. When I tap into an English note with translation service enabled but auto translations off and my preferred language set to English, it shows me the Translate Note button but it should actually be hidden away since it’s in my list of preferred languages.
Discussion
Install version 1.4.2 of AppleStore and it works perfectly with the same language settings on iOS and with the same language settings from Damus as on TestFlight. And this one translates all the languages.