What do you think are the most important reasons for choosing

In modern society knowledge of several languages is very useful.
It helps to expand opportunities of communications.
Getting information from several sources is usually more reliably.
A person who knows foreign languages can get more interesting news.
He can get professional knowledge from foreign books and web-sites.
A person can exchange his professional skills with people of other nations.
And he also get new valuable skills from them.
Knowledge of languages brings new meeting with different people.
It is a chance to get new friends.
Knowledge of foreign languages is an additional advantage for getting better career position.
In general, it gives an opportunity to have a broad view on different events in the world.