"How to say 'in the world' in English?"
"In the world" is a common phrase that can be used in various contexts. It usually means "in general" or "all over the world". For example, "In the world, there are many different cultures" means that there are numerous perse cultures worldwide. Another example would be, "In the world, nobody can avoid making mistakes" which implies that everyone makes errors at some point.
So, to answer your question, "in the world" can be said as "in the world" in English.
