I'd browsed Wikipedia for nice language descriptions, as I have a habit of doing, and stumbled across the page of the Querandí language. It didn't have a lot of information, as the language died before it had been properly studied. Now, even the wiki page is gone. Despite the lack of info, the name intrigued me however. It made me think of a divergent variety of Quenya, and so I decided to make something like that myself.
In my document, I state that Querhyetí shall be to Quenya what Åarjelsamien (South Sami) is to Finnish. With this I meant clearly related but yet really different. Åarjelsamien has a lot of words cognate with Finnish, and quite a few grammatical and typological similarities, but also shows heavy substrate influence and tons of separate developments and innovation. It's also a lot less accessible and more "mysterious" (for lack of a better word.. maybe exotic is more fitting?) than Finnish.
There still are a few "cognate" words to Quenya in the Kuerhyét vocabulary, but I strayed pretty far from the design principle early on, and it was completely abandoned in the second iteration of the language starting in 2018. Sami languages have always been a lot more interesting to me than Tolkienan languages..