Wunderground language

Anyone here that uses wunderground weather with german language? I’ve tried “weather:location.lengnau.language=de” and “weather:location.lengnau.language=DL” (DL according https://www.wunderground.com/weather/api/d/docs?d=language-support). But I get always english updates.

OpenHAB 1.8.3

Thanks
Michael