Lol I really hope you are not believing that bs...
I talked about the English language in general. When Britains talk with Americans the both talk English and understand each other. Slang is different but does not matter.
And do you have proof for English making people dumber and loosing importance?
And when only you dont understand Texans and Americans it does not mean nobody can. And I can assure you I can understand Americans and Britains quite well.