Haitian Creole has a definite article, roughly corresponding to English "the" and French le/la. It is placed after the noun, and the sound varies by the last sound of the previous word. If the last sound is an oral consonant and is preceded by an oral vowel, it becomes la. Recall that in Haitian Creole, y is always a consonant.
The usage of the definite article is slightly different in Haitian Creole. It can be used to indicate singular vs. plural if the word sa is used with the same noun, or if there is a possessor indicated.