Did a person living at this time say “I’m not German, I’m Trierian?”
Yep
They would identify as a "Deutschmen" living in some region under the rule over some lord. "Deutsch" comes from the Proto-Germanic word "*þiudiskaz", meaning "that which is of a race, people, ethnicity". This root is used to translate the Greek root "ethno-" in Old English, Old Norse, and Old Saxon. So, they would identify as "a member of the (German) race in X region in service to the feudal lord Y".
>>17441330Ahhhhhhhhhh border goreeeeee
>>17441340“German” is a fake race. “Germany” needs a total balkanization.
>>17441330They spoke a common language (High German) but they would have identified with their city or region of birth yes.