Hello! Your blog is great! Thank you! You taught me that the singular definite articles are A,An,La,Lan & Nan...I see a word "yon" used for the english word "a"...how & why is this used?Thank you!

Great! thanks :)

Yon is Haitian Creole for the indefinite articles: a & an

It is also used to translate "one" sometimes.
Example:
I have a car.
Mwen gen yon machin.

Is this a house or a boat?
Eske sa se yon kay oubyen yon bato?

I saw one bird.
Mwen te wè yon zwazo.

They have one child.
Yo gen yon timoun.

Check out the following link about "yon":
Yon: Indefinite articles

Ask me anything