FontConfig_pl.txt is identical to default FontConfig.txt, this patch does not do anything.
What exactly was your issue?
1 reply, 2 total
"[Fonts]
sFontConfigFile=Interface\FontConfig_pl.txt" is missing in "Enderal - Forgotten Stories" ini file. without it letters like ą ę ł ó, are turned into large r or squares
1 reply
If it's vanilla Enderal, you may be loading the language pack before Enderal, when it should be loaded after. This reminded me, I am going to remove fontconfig.txt from loose files, after that the load order in vanilla won't matter.

If it's a modded game, probably, some mod changing UI interferes, most likely overwriting FontConfig.txt. This means, changing load order on the left side in MO2 should also be enough.