I don't know about this bug, or how to fix it... sorry
I don't think that is something to do with my map.... Cause no one else has had this problem
1) Are you using the UGX Mod? (If so then you didn't override the fonts as you can see from the picture.)
2a) If you're not using the UGX mod then your localized_LANGUAGE_iw00.iwd is broken/tampered with.
2b) If you're not using the UGX mod then your mod is loading a gamefonts_pc.iwi image that doesn't have the proper fonts installed (note #1).