There are sometimes problems that only by speaking another language can they be best solved.

About 10 years ago, I was in Prague and travelled by train to another Czech city. I was underneath the Prague train station in the metro station when I realised I had left my mobile telephone and a book in the seat pocket on the train. I ran upstairs and was lucky to find the conductor getting off the train. I explained in English what happened and he advised me to go to the station "Lost and Found" office.

This did not sound very promising to me, so I asked him again, but this time, in German (many Czechs speak German especially outside Prague). This time, he opened the train for me and came with me to the car where I was sitting. I was able to get my things back immediately.

I have had other experiences as well where knowing another language has given me benefits that otherwise I could not have had. It cannot hurt to know more.