GOOD:
1. learning a language can help you multitask.
2. if you learn a language and go to a place were people speak that language you could be able to communicate with them to get places you need to be.
BAD:
1.People who are fluent in that language and have been through out their life would think you are rude if you pronounce something wrong.
2. it can take more than a year to learn certain languages.