For the fact that I currently live in the UAE and the official language of communication here is Arabic lanaguage, I wish that I can speak this language fluently to ease communication and understanding in spaces where the language is being spoken.
Asides from my native language and the local parlance back in Nigeria, I am also bilingual (English/French), but a whole lot of people over here barely understand or speak English or French, so, at times it is a struggle for one to explain themselves properly due to the communication barrier. Of course, one must never lose sight of the fact that for them, English/French are borrowed languages and not their mother language. There are also many who communicate effectively as well in either language and somehow we manage to get by.
I truly wish that I had applied myself more in acquiring a good command of Arabic language as it would be an advantage in many ways. I admire people who can speak multiple languages and maybe, this is a gentle reminder for me to make the necessary attempt and stop finding irrelevant excuses.