This article on “difficult languages” is The Economist at its absolute best.
My title above is Turkish and apparently means “Were you one of those people whom we could not make into a Czechoslovakian?”.
I especially liked the bit about different kinds of “we” in Kwaio, which is spoken in the Solomon Islands. We need something like that in English! That’s “we” as in all of us.
The suggested “hardest” language appears to be the result of some pretty extensive research. Let’s just say there is no mention of Welsh, nor should there be.
(Hat tip: languagehat.com)