Having objects does not make a language oriented to those objects. By your definition C++ would be considered OO, but we know it is not. Kay quite explicitly stated that C++ is not OO. I expect you're thinking of Object-based programming.

If you look at the actual definition of OO, it basically is just a laundry list of Smalltalk features. It is probably not usable outside of Smalltalk for that reason, despite Joe Armstrong's playful insistence that Erlang is the only OO language in existence.

You might be able to include Ruby and Objective-C (and, iff you're really stretching, Swift with @objc enabled), but that's about the extent of it.