The biggest reason that has long motivated me to learn a foreign language is being able to communicate with people who don't speak my language. I just want to experience, know, feel, and understand the world around them as much I want them to see how my world point of view in life works for me and for my people.
What's most amazing about the language is it acts like a bridge that connects the world together and brings us all closer to mutual understanding of differences there may be in life as human beings.
The more languages you can speak, the better opportunities you have to experience the whole wide world.
So, good luck and have fun to all who are learning the languages.
Cheers!