TJC - Mainland China
Nextion - International
When you buy a Nextion, then Nextion support is at nextion.itead.cc
When you buy a TJC you use TJC for support whether you think the language is crazy or not. Since both originate from China, it would be best to not refer to language as crazy - not a good idea. Sorry. TJC and Nextion work together to ensure firmware from one is not usable with the other, so your option is use TJC for support.
PS. This forum closed last year Nov 15.