Should OOP learn any language?

Question

OOP

Should OOP learn any language? Or is it purely theoretical?

Answer 1

Better with the language, otherwise it will not be understandable.
Ideally, the language should have such an entity as interfaces or at least abstract classes.

Answer 2

OOP in different languages ​​has slight differences, for example, there is C ++ with multiple inheritance, in Java there is an implementation of multiple inheritance already through interfaces.
In general, if you are going through OOP, then most likely you already know the basic syntax of the language you are learning in, it is better to study it, of course, but the OOP theory itself implies studying the subject without code. When I started in Java, I delved into examples from articles in which there was the same Php and it seems like I didn’t have any special problems with understanding. There is no hard binding, but of course it is better to see clearly examples of implementations in order to understand the subject as deeply as possible.