Context: When talking about the German language, the term German dialects is only used for the traditional regional varieties. That allows them to be distinguished from the regional varieties of modern standard German.

Question: When is the term 'German dialects' used in regard to the German language?
Answer: traditional regional varieties

Question: What are traditional region varieties of German distinguished from?
Answer: the regional varieties of modern standard German

Question: Which term is only used for nontraditional varieties?
Answer: Unanswerable

Question: Which term is only used for national varieties?
Answer: Unanswerable

Question: In reference to modern varieties, what term is only used for traditional regional languages?
Answer: Unanswerable

Question: What does this allow the to remain undistinguished from?
Answer: Unanswerable

Question: Because of this, what is ancient standard German distinguished from?
Answer: Unanswerable