1 members found this post helpful.
Y-R1b is a so numerous and forked male lineage since a so long time that we cannot ascribe all of them the same unique familiy of languages, I think. For Y-R1, it was so long ago born... The lineages as R1b-V88 could have spoken very different languages compared to the R1b-L23 descendants ones. For languages continuity or shift, we have a lot of different occurrences, depending on more than a cause (relative densities, military power and organisation, trade, founder effects for Y lineages...