For Amethyst to translate you need to install the Google Play version.
The lighter version of the app doesn't include the translation libraries.
I'm not sure about the other clients.
Discussion
I download my Amethyst from GitHub using Obtainium but I still need to choose which package to install.
Thanks Brisket
That screenshot is from Primal in browser running on linux
It's dependent on the client how notes are rendered.
You might be able to copy the note contents & then drop them into a web translator. Usually a long tap or right click on the note.
It's a bit cumbersome, but it would get you by.