It is "piece." The original saying is "Speak your piece" meaning to have your say in the matter.
Both spellings are correct, although speaking your "peace" only makes sense in a very limited context - that of "peace", while "piece" makes sense in nearly every other context.
The homonym for 'peace' is 'piece'.
peace, piece
piece, peace
piece
piece as in a piece of pizzaHe ate a piece of pizza.
speak your piece
The homonym for 'peace' is 'piece'.
Peace Piece was created in 1958.
It could be either. Are you otherwise talking about a peace, or a piece?
this peace of junk is a broken into piece
peace, piece
piece, peace
piece
Dubai is a peaceful place to buy a piece of land.
There was peace when he ate his piece of 🎂(cake).
piece as in a piece of pizzaHe ate a piece of pizza.
well there r 2 ways of spelling it there is piece meaning piece of paper and peace meaning peace and quiet