Here's why:
* National Language: Haitian Creole is the official language of Haiti, alongside French.
* Everyday Use: It's the primary language of everyday communication in Haiti, used in homes, schools, and public spaces.
* Limited French Proficiency: While French is also an official language, many Haitians have limited proficiency in it.
Therefore, it's reasonable to estimate that nearly all Haitians speak Haitian Creole.