My question is, is it possible with Wix multilingual options translate only specific parts of website? As there is need for translating only couple of services and pages which will be offered to other countries. Or am I forced to translate everything on the website?
You can’t install Wix Multilanguage app for specific page or section of your site but you can translate anything you want.
Basically you can only translate few pages and leave others. But languages you’ve installed will be still there you can’t hide that.
What you can do is;
You can use Velo to check user current language and redirect them to main language for other pages. (This will require JS and Velo)