It seems likely you are not using the code page correctly, but it's not for me to describe. It's an old Microsoft system, which you can look up if you want.
LFS can help a bit though. You can try writing a player name using the word you want, then exit from the player options, now have a look in data\misc - I think the new .ply file name will have the correct character encoding.
i did code page method at notepad,but it show different word at game. ^j,^h,^s is show different word. watch photo.
i think my windows have problem.player name was not problem.
Player name was never the problem, it was just an example, to hopefully demonstrate the correct encoding.
In my copy of Notepad, there is a menu in "Format" "Font..." and in there is a drop-down "Script" where you can select the code page represented by the characters in the file. I think you may need to select the correct "Script" for the language you are typing in there.