OK, I understand the problem. But character "ç" is not a part of Czech language
so I cannot review it. I see this letter on the "character maps" in the file
system of the game (./graphics/font/) so I would expect it should be visible in
the game text as well. Of course I can be wrong.

I do not see any issue with letters from Czech language point of view. All are
displayed correctly. The "look & feel" of the letters like "á" could be point of
discussion but I'm fine with the current status.

The "New Player" text appeared on Transifex already. I updated the translation
for Czech lang. and updated my local game installation with new translations but
the text still appears in English. I tested it with German language as well and
the result is the same. Local source file contains the updated translation but
it is not displayed in the game.

I found some other language/translation issues but I would not add it here since
the purpose of this ticket was to add Czech language to the game. This actually
happened already.
Moreover ticket history is growing and it is not easy to keep control what's
still persisting and what's solved.
Thanks that I would propose to close this ticket. Are you OK to close it as well
please?

I will open new ticket(s) for issues I found.

Thank you