There are still a few living Texans who grew up speaking German, most now elderly. The Texas German Dialect Project has made an effort to preserve their speech in recordings; its website is wonky, with an apparently dead homepage, but sometimes you can still guess what the current URL of their Links page is. http://www.tgdp.org/links
(Formerly ...links.php, but that seems dead at the moment too.)
However, even in small Texas towns with German heritage, I don't believe any younger generations still speak it as a first language at home the way the Amish do.
So it's interesting to see examples of an immigrant dialect that's still spoken -- thanks, ion, for the links.
Interesting, that about 'gleiche(n)' as a kind of hybrid verb.