I hear this a lot:"Mwen byen kontan" Does the word byen mean 'well' here? (I am very well happy or I might as well be happy?)

Here it means truly, really, very, so, so much

Nou byen kontan ou te vini. - We're very happy that you came to see us.
Mwen te byen sonje w pandan w pa t la a. - I truly missed you while you were away.
Kè m byen fè m mal pou ou. - I feel so sorry for you.

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