I have the opportunity to apply for a residence permit through:
I like §19d better because it gives me the opportunity to apply for a Blue Card afterwards which in turn would accelerate the process to apply for a permanent residence permit.
But I’m confused on the German language proficiency required by §19d.
AufenthG §19d (1) 3:
has sufficient knowledge of the German language
What is “sufficient knowledge” in terms of CEFR?