[NFP] Adding Special Characters to In-Game Text?

[EliteBerzerker18]

I'm not a modder per say but I do like to tweak around with some stuff in game to add flavor or increase cultural accuracy. Anyways, I am trying to tweak some city names to include special characters, for example changing Beijing to Běijīng. However, the game doesn't seem to support all of these characters in English, it'll just display as a blank box. I was wondering if there is a way to modify the xml code somewhere for the English text (rather than trying to create a new language entirely) to allow for the characters not currently included, perhaps using something like UseExtendedFont to allow for all utf-8 characters? I'm just not sure how to go about this or where to find the right places to change the code within the xml files.