When using a custom plateFont setting for a terrain, the game will keep showing it in other terrains.
Set "LucidaConsoleB" as plateFont for Altis. Then place a car. The font works.
Now load Tanoa and palce a car. The font will be the same as before.
HOWEVER, on //some// car classes the correct font will randomly show. So it's not that the plateFont doesn't refresh at all, it just seems to happen whenever it wants to.