Step-by-step explanation:
Just copy it by long pressing on the
messages then go to G-o-G-l-e
( I spelt it wrong because we can't mention other
apps or sites or search engine etc here) and type translator (don't download anything) you will see a free translator, go into the site and change it to your preferred language then long press on your screen and you would see options appear, select paste and all your messages would be
written down there and then press translate.
DONE.
A simpler way of saying it is " Just copy and paste it into a translator and then translate it .
Good luck ✅