Where is font folder?

I tried to translate the language game.

the font to change in locale_game.txt.
(UI_DEF_FONT gulim:12
UI_DEF_FONT_LARGE gulim:16
UI_DEF_FONT_SMALL gulim:9)

the font is in windows/font folder.

However, the text is broken in game.

Why is it?

where is font folder?

please help me.