[gota]

I was captured by the same thread; I was particularly looking forward for any material on how/if their language diverged from the general population's. Over this long span of time, even in such a small group, do they end up speaking a dialect?

Couldn't find material on that, still looking

[wbrasky]

The Lykov Family have been well-covered. VICE had a decent piece covering the sole remaining member: Agafia. Their speech did somewhat devolve, and children born out in the taiga had developed their own cooing pidgin that they spoke to each other, IIRC.