Gene, that's quite a collection of languages. I had an instructor at a training site with which I expect you're familiar who spoke Xhosa, the "click" language of South Africa.
When I was teaching French at Northern Iowa, the two profs who were doing the language methods class had me come in and give a brief class in Arabic. Arabic, unlike most European languages, doesn't have infinitives. So I did an exercise with the students based on "I want to, you want to followed by a verb. Not only does the "want" form change. So does "to eat" or whatever verb I was using. That really confused students used to Spanish, French, German, and Russian.
