Need help

I have three questions.
1. How to translate the site into other languages? For example, in Russian and Ukrainian.
2. On the page “http://trophy.travel/tours/discover-singapore/” I have 3 tabs “description”, “ITINERARY” and “REVIEWS”. I want to replace the “REVIEWS” tab with the same one as the “description”, so that I could write additional information there.
3. How to disable comments?