[qwytw]

> the closest you can get in Europe is by listening to Lithuanian (especially the older dialects of it)

I'm not sure that's true. I mean Baltic languages are generally considered to be one of the last to diverge from PIE but that doesn't mean the sound that similar. They preserve many archaic features but there has also been a lot of innovation over thousands of years (especially considering that modern standard Lithuanian is to some degree a constructed language).

While certain grammatical features like almost the whole case system have been preserved too a higher degree than in other IE languages. Lithuanian has still lost laryngeals, aspirated stops etc. which means it sounds very differently to what proto Indo-European might have sounded.