* Different definitions of "Greek speaker": Do we mean native speakers, those who speak it fluently, or those who can understand it to some degree?
* Data collection limitations: It's not always easy to gather accurate data on language use across different regions and populations.
However, we can give you some estimations:
* Around 13 million people worldwide speak Greek as their native language. This includes Greece itself, as well as large Greek communities in countries like Cyprus, the United States, Australia, and Canada.
* Millions more speak Greek as a second language, especially in countries with a significant Greek diaspora.
* The number of Greek speakers is declining in some areas, particularly among younger generations in Greece.
So, while we can't give a precise figure, it's safe to say that tens of millions of people worldwide speak Greek in various ways.