A small design suggestion. Right now the site uses the Calibre font. It has no support for languages other than English. Therefore, mixed texts in English and Russian at the same time look very ugly. The shapes and sizes of the letters are different for the different languages. I think the same happens not only with Cyrillic (Russian), but also with other non-English texts. It seems to me that it is better to use the standard Microsoft font Calibri. It is multilingual. That is, not CalibrE, but CalibrI.

I think that's just a typo by the designer )).

Replace html{ font-family: Calibre,sans-serif; } with html{ font-family: Calibri,sans-serif; } in the index.css file