[ElDanés]

Well, Chinese has never been considered a very hard language to learn because of its analytical nature, but of course, everything is relative.

I doubt I'd ever need Swahili, and I thus don't see why I should learn it. If I had to learn some language of Africa which I wouldn't get any use of anyway, like with Swahili, but merely for the fun of learning it, I'd rather learn some more (in my eyes) interesting language, like one of the many languages with pretty complex phonologies, like many of the Khoisan and Bantu languages (among many other language families and sub-branches) with their clicks and tones.