Bartleby, the free (as in beer) ‘Inter­net pub­lisher’, has avail­able a fas­ci­nat­ing graphic depict­ing the evo­lu­tion of lan­guage (all those stem­ming from the sin­gle Proto-Indo-European lan­guage, any­way).

Now I know the his­toric route of my native tongue (as opposed to my cra­dle tongue), Welsh: it’s clos­est ‘rel­a­tives’ are Cor­nish and Bre­ton (in that order) as they are all Bry­thonic lan­guages that in turn stem from Insu­lar Celtic.

Update: It appears the orig­i­nal has been removed/taken down. I’ve updated the link above to point to a local copy.