Ess~ I think you're marvelous.
I love languages and learning about them. Preservation is very cool, in my eyes, though I do accept other ideas as well. Balance is important to me so I can communicate, or what's the sense in knowing a word that no one knows and it poses as a communication barrier. We can educate people, but in my experience, some people don't want to be educated, they just want to chat. You know? Andgitan, annehmen, comprendre, comprender, capire, etcētera.
Incidentally, I know you mentioned Germanic tribes as being a source of our English. There were so many of them, but I believe they evolved from the Celts, so the term Germanic, is not an original term, but a derived one from the Celtic language, I think. I'm just recalling some history classes here and that's been a while, but you may want to check that out.
Parts of your thread reminded me of the father Gus in the movie, My Big Fat Greek Wedding:
"Give me a word, any word, and I show you that the root of that word is Greek."
"You know, the root of the word Miller is a Greek word. Miller come from the Greek word "milo," which is mean "apple," so there you go. As many of you know, our name, Portokalos, is come from the Greek word "portokali," which mean "orange." So, okay? Here tonight, we have, ah, apple and orange. We all different, but in the end, we all fruit."
I try to have a dictionary handy that shows the etymology which helps me to develop my skills in writing, my vocabulary, and my word comprehension. Needless to say, I'll never be perfect and I'll never be able to say I'm done.