Cyrillic titles / sections / etc. generate incorrect links

[danilbraun]

The cyrillic letters are replaced by underscores in the links, and if the names of two sections have the same length (the same number of characters), the link to two different sections will be the same.

[wwall]

for cyrillic letters you can edit regexp in file racket/pkgs/scribble-lib/scribble/private/tag.rkt in function gen-tag and add "а-яА-Я"
quickfix

(define (gen-tag content)
  (datum-intern-literal
   ;; Generate tag from ASCII plus CJK characters. Constraining to
   ;; ASCII for most purposes helps avoid encoding issues for
   ;; uncooperative environments, but constraining to ASCII is too
   ;; uncooperative in another direction for CJK text (i.e., creates
   ;; too many conflicting tags).
   (regexp-replace* #px"[^-А-Яа-яa-zA-Z0-9_=\u4e00-\u9fff\u3040-\u309F\u30A0-\u30FF]"
                    (content->string content) "_")))