menm si mwen ta gen madichon deye mwen, mwen pap kapab pale ak moun nenpot ki jan

madichon n. → curse

gen madichon dèyè w (lit. to have a curse behind you)
to have a death wish
to be cursed
to be self-destructive
to be very daring
to show impudence
to have a lot of nerve

Menm si   |  mwen ta     | gen madichon dèyè mwen,
Even if       |   I would       | have a death wish,

 mwen |  p'ap kapab       | pale ak moun         |  nenpòt ki jan
I           |  will not be able   | to talk with people    |  in anyway

Menm si mwen ta gen madichon dèyè mwen, mwen p'ap kapab pale ak moun  nenpòt ki jan
Even if I was cursed, I would not dare talk to people anyway I please.

This is how I see this sentence:

Even if I was cursed, I would not show such effrontery when talking to people.

Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words