Greasy Fork is available in English.
Translates selected text into a `tooltip' via Google translate
< Rückmeldungen auftranslate.google tooltip
The script stopped working, at least with chrome+tampermonkey. You can fix it, by uncommenting the 621-st line (the furry number hehe), that is, replacing
//TKK='427882.1140482906'
with
TKK='427882.1140482906'
. With tampermonkey it's easy and intuitive to modify an already installed script.
Not working
Nothing works