Translation of Unterbegriff

I like writting you messages although most of it is really pointless. I mean it is very good for my English studies, but except that I could not understand why you would be interested in reading it.
Language education is very important to me, because I really want to communicate with other cultures and people. If I could I would learn all languages: Spanish, German, French, Portuguese and Italian.
We paid for the taxi and waited thirty minutes for the driver to arrive. Again, Argentina reminded me of Italy. We drove into town and were looking for a place. The town made a great first impression.