I like to introduce the one and only TRS-80 forum with German as main language in use there. There a many fantastic forums in English language like here in the Vintage Computer Forums. But there was nothing comparable in German language. So it was time to establish a forum that addresses TRS-80 fans with limited English language knowledge. Take a look if you like:

TRS-80 Forum - Alte Computer von Tandy

Viel Spass!