While it's difficult to get an exact number of speakers, estimates range from 100,000 to 2 million worldwide. This makes it the most widely spoken constructed language, though it is still significantly less spoken than any natural language.
It's important to note that:
* Esperanto is a language specifically designed for international communication, aiming to be simple and accessible to learn.
* Other constructed languages exist, such as Volapük and Interlingua, but none have reached the same level of usage as Esperanto.
While Esperanto doesn't have the same widespread adoption as major natural languages, it continues to be a significant force in promoting international communication and understanding.