…does not work at all. The only error it returns after clicking any parapgraph to translate is «Automatic translation failed!» I tried to translate «Трыстан-да-Куньня» from be-wiki.
Topic on Talk:Content translation/V2
See other topics of this talk, how to install the Translator script, and You will be lucky.
Searching talk page doesn't return any result about «Translator script», can You be more specific?
Sorry, go for installation of automatic translation these topics: The script from Endo999, required on the user side, see Topic:Udmnnnrjpzq5dbe0 or how to install in Topic:Uj61e2fkvlf5qy5o and Topic:Uas7z3lf379cp60t. Then mark the text section and to hold down CTRL and ALT key to translate the marked text inside the CXT.
I have not vector but modern skin installed. Should I try to do instructions provided into modern.js file? Or CT2 doesn't working on it and I shouldn't even try it?
The potential risks are described there. You first may try to copy and paste Google Translator, with some text from the article to see what You will get.