Don't tell me, my native language uses a bunch of those weird çharacters. I also know that it always eventually cause problems because there's always legacy software that doesn't handle them properly.

But what really is the purpose of allowing supporting in key names? Current keyboards - at least those sold in Europe - do have a key for €, but imagine some lunatic "app developer" insists that another INI key name should be spelled "value in ¥". Customers, coworkers, support desk staff, everyone will curse them.