Adding Font on Addon

[Balgamov]

Hi. I'm trying to translate the game to my language and I need some assistance. I finished client and pregame files translation. I don't know how coding work so i took .lua and .str files from another translation team. (with their consent ofc) My questions are :

1-) There are some letters in my language like : "ş,ğ,ö,ü,ı,İ" These letters seems without error except "İ" and "ı" .
For example :
https://imgur.com/boFfJoZ

If i change "Lore Kitaplığı" to "Lore KitaplIğI" , thats fixing the situation in one side. Then it brokes the other side. Lower case letters not seems right when they are becoming upper case letters.

How can I make "ı" to "I" or "i" to "İ" ?

2-) I started translate .lang file recently. But this time the letters that i said earlier seems like this :

https://imgur.com/gXiIxvq

I tried to fix it with adding Font commands to client and pregame files like this :

[Font:ZoFontGame] = "fonts/univers57.otf|18|soft-shadow-thin"
[Font:ZoFontGameMedium] = "fonts/univers57.otf|18|soft-shadow-thin"
[Font:ZoFontGameLarge] = "fonts/univers57.otf|18|soft-shadow-thin"
[Font:ZoFontEdit] = "fonts/univers57.otf|18|shadow"/>
[Font:ZoFontChat] = "fonts/univers57.otf|18|soft-shadow-thin"
[Font:ZoFontEditChat] = "fonts/univers57.otf|18|shadow"
[Font:ZoFontTooltipSubtitle] = "fonts/univers57.otf|18"
[Font:ZoFontKeybindStripKey] = "fonts/univers57.otf|20|soft-shadow-thin"
[Font:ZoFontSubtitleText] = "fonts/univers57.otf|28|soft-shadow-thick"
[Font:ZoMarketAnnouncementKeyboardDescriptionFont] = "fonts/univers57.otf|22"

I checked my univers57 font have all of those letters. BUT after that it become like this :

https://imgur.com/oWnofly

So all the letters that i said before become hidden this time.

3-) I need to know if there is any letter limit on .lang file. Let me explain :

I changed "Crusty Bread" to "Kuru Ekmek". After that, some items in my inventory lost 2 letters from left like "Ferno Staff of a Mother's Sorrow" . I put 2 space after my translation and it's fixed. But how can i make it right if the translated word have more letters than the original ?

I know I asked too much with too little English lol. But I spend like 2 month for this and I REALY want to make my translation right.