Maybe have the Edain speak in Northern English or Irish? Maybe even Scottish?...
They're not particularly considered upper-class, from my recollections of The Hobbit. The Bagginses (at least until Bilbo) are seen as more respectable than the Tooks.adventurous doesn't mean they don´t speak like snobbish upperclass. I absolutely think they should! they´re the most dandylike hobbits i could imagine..
Fascinating! Have you actually had an opportunity to look at the Taliska corpus? Has it been published or are you somebody privileged to see unpublished texts...?JRRT changed the Taliska thing all the time. I disagree that it became Halethian, neither it became Adunaic. It became Beorian... all it´s character is most closely related to JRRTs Ilkorin Tongues. It´s a language that will die out and leave little impact... a minor relative of proto-Adunaic, same family but a bit different. Maybe a bit like Sindarin and Nandorin.
The few Halethian we have are different from the early Taliska. Halethian has a bit of a mix of Anglo-saxon and welsh to it.