A faction contract type that requires you to hunt orcs (greenskins) seems to have couple of localization variations that have bad characters or something. The problem is, there are several variations of the text that keep getting rotated, but there are several (at least 2) which contain some character that doesnt look right.
Look at the “?” question mark character in the middle of that text.
Ill attach a save game that you can use to easily reproduce this (just walk to the nearest settlement and take faction quest).