It takes much time to learn a language. There are many reasons to learn a language.
▲Emigration(移民)
When you move to a different country or region (地区), learning the local language will help you communicate with the local community. Even if many local people speak your language, it's important to learn their language. It will also give you a better understanding of their culture and way of thinking.
▲Work
lf your work is about languages, talking to people in their own languages will help you communicate with them. Knowing languages may also increase your opportunity(机会)of finding a new job, getting a promotion(晋升), a transfer (转移)overseas, or going on foreign business trips.
Many English-speaking business people don't bother(麻烦) to learn other languages because they believe English is widely spoken around the world. The lack(缺乏) of foreign language knowledge puts the English speakers at a disadvantage.
▲Travel
When you go on holiday, you can get more information by speaking English. If people don't understand you, you can speak slowly and raise the voice.
▲Food
Perhaps you enjoy the food and drink of a country or a region and make trips there. It is very useful to learn a foreign language.