There are over 7000 languages spoken today, English being the most prominantly used.
Many countries have a national language, but not all.
Our culture has many different people of different races, and speaking different languages.
Some people may speak more than 1 language, or maybe more than 2. There is no limit.
It's important to learn your language adequately, and know all of the usages of words.
Knowing what your language is built upon, and where it orignated from will help you better understand your culture and your heritage.