When someone speaks English as a second or foreign language, it means they didn't grow up speaking English as their first language. They might have learned it later in life, like in school or as an adult.
So imagine you're playing a game and the rules are in German. If you don't speak German, you might have a hard time understanding the rules and playing the game correctly. But if someone explains the rules to you in English, you'll be able to play the game better.
It's kind of like that for people who are learning English. They might know another language and feel more comfortable speaking and reading in that language. But if someone explains things in English, they'll be able to understand better and communicate more effectively with English speakers.
Learning a new language takes time and practice, just like learning to ride a bike or play a sport. It can be challenging at times, but it can also be really rewarding. And the more someone practices, the better they'll get!