Sergey Smerikov replied giving permission.

See racket/racket#1570.

Author: samth

LICENSE

@@ -8,9 +8,7 @@ version 2.0 or any later version. This applies to the following files:
 
   string-constants-lib/string-constants/private/dutch-string-constants.rkt
   string-constants-lib/string-constants/private/korean-string-constants.rkt
-  string-constants-lib/string-constants/private/russian-string-constants.rkt
   string-constants-lib/string-constants/private/spanish-string-constants.rkt
-  string-constants-lib/string-constants/private/ukranian-string-constants.rkt
 
 See the files
   https://github.com/racket/racket/blob/master/racket/src/LICENSE-APACHE.txt