In Algeria, there are many different ways of talking that people use depending on where they live and what their family speaks at home. These different ways of talking are called "languages." Some people in Algeria speak the official language of the country, which is called "Arabic." Arabic is kind of like the "main" language that everyone is supposed to be able to speak and understand, like how most people in the United States speak English. But just like how people in the USA might also speak Spanish or French or other languages, people in Algeria also speak other languages in addition to Arabic.
One of the other important languages spoken in Algeria is called "Berber." This is a really old language that has been spoken in North Africa for thousands of years. Some people in Algeria still speak Berber at home, especially in more rural areas. Berber has its own sounds and words that are different from Arabic.
Another language that is sometimes spoken in Algeria is French. This is because Algeria used to be a colony of France, which means that a long time ago, France controlled Algeria and brought over a lot of French people and customs. Even though Algeria is now an independent country, some people still speak French because it was passed down from their ancestors.
So, to summarize, in Algeria, people speak different languages depending on where they come from and what their family speaks at home. The "official" language is Arabic, but other important languages spoken in the country include Berber and French.