Communication is absolutely necessary.
Are you able express complex ideas in at least one language? If yes, then you’re done. Otherwise it’ll get really hard.
<< INSERT A REALLY HARD IDEA TO EXPLAIN >>
I’ve been studying English since childhood and I remember our teachers stressing hard on the importance of communication and I (used to) shrug it off like “Science and Math” don’t need languages.
But now that I look back and I see the current scenario where I almost struggle to find simpler words — my (native English) colleagues speak it so well and with such efficiency that sometimes I’m awestruck at their art of communication.
While they speak like a clean calm stream of water, mine is more turbulent at times. I see scope of improvement! :)