Another fun fact: at least in Croatia, we colloquially call them "schwabs" which...

shimonabi · on April 27, 2021

Can confirm (as a Slovenian), the term is used through the Balkans. For example, it is present in the old Serbian song:

Četrnaeste, četrnaeste, Švaba udario, (2x) Osamnaeste, osamnaeste, Srbin pobedio. (2x)

(In the 14th year, the Schwab struck. In the 18th year, the Serb won.)

https://hr.wikipedia.org/wiki/Ko_to_ka%C5%BEe,_Srbija_je_mal...

It comes from the fact that Germany didn't unify until very late, so the people were called by the small city-states that they came from. In American revolutionary war, some British mercenaries were called Hessians....