
That being said for the vast majority, the greatest inspiration to learn one of the most valuable languages lies with their work.
English has been established as a sort of lingua franca spoken globally.
However, English does not suffice to be able to communicate in all work sectors (particularly those related to tourism and international business.
Criteria used to determine the most useful language to learn for you:
I identified two main criteria that we can use to determine the most useful languages:
The number of speakers throughout the world