Pierre C. Sibiry Traore makes an offer:
I’ve been trying to join the ethnologue.com database with detailed shapefiles of dominant linguistic groups of Africa at a fairly detailed level, but lack time/resources to dig in further. If someone, self-funded (PhD student…) is interested in an in-depth investigation I’d be willing to spend some time towards joint publications! Or better, host him/her at SotubaGIS, Bamako, Mali.
Any takers?