How can I replace a board in floating wood floor?
You'd have to treat it like a hardwood floor t&amp;g repair:


Run a circular saw down one side, staying away from seam at least
the thickness of the tongue, with depth set to board thickness.
Repeat #1 along the other side.
Connect the top and bottom cuts across the board, either with a chisel or OMT (Oscillating multi tool).
Carefully cut into corners to free the 4 border pieces, as necessary.  They may just pry out.
Trim the bottom half of the groove off. (I like to use a table saw and fence).  You should be able to wedge it in with the tongue intact, though a small bottom bevel might assist it.
Sparingly glue along edges of existing tongues and the new board edges and weight it down, as necessary.