Chinese! I am fascinated by the writing in particular.
As you say you are not keen on languages, what about a musical instrument. If you have never played one, you could find a ukulele group for beginners - they are very popular at the moment and lots of fun.
Or what about a new art/craft. I have dabbled in lace making (with bobbins) which I love and has caused a lot of interest among friends, but it is a bit slow, and nobody wants a lot of lace at the moment. I haven't got much further than bookmarks (!) but you can get patterns for pictures which can be mounted and displayed, or Christmas decorations etc.
Researching your ancestors is another interesting hobby which is popular but can get a bit obsessive at times!
All these things and much more can probably be found at your local U3A.