Know at least two or three languages, so if one dies off, you have another one to fall back on while you train for a new technology.

至少了解两到三种 语言，所以，如果某种语言过时了，你在学习新技术的时候还可以依靠另一种语言。

youdao

Belgium has three official languages, one for each community: Dutch, French and German.

比利时有三个官方语言，每种语言都有自己的社区：荷兰语、法语和德语。

youdao

One eof my friends can speak three foreign languages; so can his wife.

我的一个朋友会说三门外国语，他的妻子也会。 。

youdao

When opting for one of the foreign languages, the student has from three months to one year to complete the program, divided in three modules (Basic, Professional and Regional), with a total duration of 80 hours.

FORBES: Can Teaching Brazilians New Languages Turn 'Wizard' Into A Billionaire?

The books have been translated into twenty languages and have been turned into three documentaries, two of which were nominated for Emmys and one of which won an Emmy.

CNN: About