A Steam review (https://steamcommunity.com/id/drm343/recommended/434520/) from a Chinese player pointed out the following:
QuoteAlthough it says it supports traditional Chinese, you have to set your own fonts, and it only supports ttf and otf. Currently, a lot of Chinese fonts use ttc, so it doesn't work.
Freefont can read TTC, so it probably just need another search mask.