Hi Irakli

1. if it is possible to use Google_Translate at KOHA translation server

It's possible, but is a paid service. For that reason is not enabled in our server.

But you can use the public interface of translate.google.com as a help in the translation proccess.

I've just setup a key for a free service, https://translate.yandex.com, you can use it by pressing in a

'Y' sorrounded by a small box, on the top right of the text to translate.

That will 'translate' your text, replacing the text in the translation box.

It's a machine translation, so check the result.

Regards

Bernardo