I'm trying to figure out if a language called Thaqovelith still exists or not. It is referenced in a book called "A descriptive phonology of Thaqovelith" published in 1980, so I believe it was not extinct then. I believe it may be a berber language.
It is alive enough that there is a Wikipedia entry. It is a dialect of Kabyle Berber indigenously called Taqbaylit ([ˈθɐqβæjlɪθ] if Wiki is to be believed). Shaltz doesn't get more specific than say "Northeast zone" and doesn't name the specific village. (The mapping from speling to pronunciation they give conforms to what I know of Berber phonology; ta-...-t is feminine noun inflection so the root qbayl is basically the same as the root Kabyle).
According to Ethnolgue, the language called Thaqovelith is also known as Kabyle, and has around 5,586,000 speakers worldwide.