The bibliography styles work through something called CSL (Citation Style Language) and they can adapt to your document language. However, you do have to set your text language first in Typst with #set text(lang: "ru")
. This also enables correct hyphenation and, if possible, spell check. As for customizing the citation style, maybe @Andrew knows more.
#set text(lang: "ru")
#bibliography(
bytes(
```
@book{sevastyanov,
title = "Курс теории вероятностей и математической статистики",
author = "Б.А. Севастьянов",
pages = "272",
publisher = "Институт компьютерных исследований",
year = "2019"
}
```.text
),
title: "Источники литературы",
full: true,
style: "gost-r-705-2008-numeric"
)