It doesn't matter if I specify English, or any language, aria consistently responds in German. I might speak more than one language but German isn't one of them. I started using Aria maybe an hour ago. I've used a lot of different ai options (that are free) and this has never been an issue. There isn't a way (to my knowledge) to set the output language. It's just... odd. I think the first conversation with aria was in english but I may have had to ask it to respond in english. I'm not in Germany nor visit German websites (nothing wrong with the language, it's just not one I currently understand.)