How do you say is studying in

The phrase "is studying in" is already grammatically correct and commonly used in English. You don't need to change it.

However, you might be looking for different ways to express the same idea, depending on the context. Here are a few options:

Formal:

* Is pursuing studies at

* Is enrolled at

* Is a student at

* Is currently attending

Informal:

* Is going to school at

* Is taking classes at

* Is learning at

Examples:

* Formal: He is studying in a prestigious university in London.

* Informal: She is going to school at a local community college.

Remember to choose the phrase that best suits the tone and formality of your writing.