Bad Friedrichshall + -er
Bad Friedrichshaller (invariable)
- from, of, or pertaining to Bad Friedrichshall
- Words like this are indeclinable adjectives in modern German, as noted by the Duden, DWDS and other modern references. They originated as genitive plurals of substantives, as noted by 18th century grammarian Johann Christoph Adelung and 19th century linguist Hermann Möller: e.g. Berliner Pfannkuchen = Pfannkuchen der Berliner = "pancake of the Berliners". See -er.