For me if i don’t know more than one single language then it will be hard to communicate with others in my own country, i currently have core of 4 languages which are my own mother tongue , Hindi (yeah hindi is not my mother tongue but it is derived from it ) , English and Gujarati. If i won’t know any one of these then I would might face problem in communication with my neighbors. Lol my brother is ahead of me he knows little bit of French too 
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