Some things to think about a) your prompt is ambigious in the sense of do you want masculine nouns or nouns prepended with "der". b) Prompting in the language you want the output to be usually results in better output. c) German is actually a really difficult case for articles as feminin nouns can be use "der" depending on context and meaning. Making it harder for LLMs to pick up. e.g. Die Welt dreht sich. Auf der Welt leben. Auf die Welt gekommen.

d) GPT4 is significantly worse in german and most other languages, than in english anyways.