FoF 1.3.110 for Linux overrides international.ttf when using a non-ASCII font (asciiOnly = false), and displays a (python's?) system font instead (systemFont = True). (Data.py, lines 72-73)
This patch simply removes "systemFont = not asciiOnly" and uses the default ("systemFont = False") so systemFont is never used and international.ttf is used instead (lines 64-69 handle that).
To be applied to src/Data.py
I'll do some testing of this on linux later today. If this is still an issue, please submit a pull request to the GitHub project.
https://github.com/fretsonfire/fof-python