Yeah, please upload some samples.

You need to upload some samples, because there are a lot of games usinng FNT extension and each file can be different.
In most cases it should contain mapping for characters (ID, width, height, PosX, PosY etc.)

As I understand it, if I replace everything there with Russian, will it work for me?

If you'll do it correctly and also adjust characters in the text files, then yes.

That depends on the game. Some games are using standard formats like TTF or DDS and you can edit them with tools that already exists https://ikskoks.pl/poradnik-8-edycja-czcionek-w-formacie-ttf-oraz-dds/ But some games are using custom fonts and to edit them you need to reverse engineer file format ...

Can you upload more samples?
There should be also some file with english text, can you attach it as well?


And what do you mean by "ROOT"? Was this file packed inside some other archive or in rom itself?

I told you that you need to modify game font if your characters aren't supported by default.

I've tried 'encrypt archive' and other methods. But again game stuck on black screen. Then I would say that you have issue with your source files, not with archive itself. Try to do only very small change first - like changing one letter only in some random word and try to check this change in game...

Which version of ttarchext and ttg tools are you using?

Also, you should choose proper version of the archive and select "Encrypt archive" if it is needed.

Did you try to use POSTed?
https://postal.fandom.com/wiki/POSTAL2_Modding/POSTed

What do you mean by "it didn't work"? Did you get some error messages?

Well, here are some tools https://github.com/wmltogether/Ninokuni-Images-Tool
Also there is some script here viewtopic.php?p=82952#p82952

So you can try to use these and if it doesn't help, then some adjustments need to be made.

Just use total commander https://ikskoks.pl/searching-text-strin ... commander/

This is link for pirated version. Please don't share such things here, it is forbidden.

There is no free version.

You can't just "get it". You need to buy it in the asset store first
https://assetstore.unity.com/packages/t ... tion-14884
and then probably add it to your Unity project.