How to send 301 Redirect correctly?

Question

htaccess

Good afternoon! There is a task to write a redirect of 1000 links. I decided to parse them from a file and use a script to generate a redirect line in the following format "Redirect 301 from where to". Everything went ok, but noticed a strange feature.
There is a rule "Redirect 301 /about/ /o-kompanii/" , when visiting /about/ page it redirects as it should, but if you go to /about/123/ it redirects to /o-kompanii/123/ . It shouldn't happen, how can I make sure this doesn't happen? (Limit ^/about/$ doesn't work).
And another question, what about links that have Russian letters and spaces? My htaccess does not see these links and does not redirect

Answer 1

1) about Cyrillic characters - use punycode
2) about redirecting by regex, use RedirectMatch
3) sometimes if there are extra spaces or tabs between "from where" and "where" then the redirect does not work.