use:
if word in ["belize", "cambodge", "mexique", "mozambique", "zaire", "zimbabe"]:
    print("le",word)
The problem here is that word==("belize")or("cambodge")or("mexique") is not doing what you think.  There are lots of explanations of this around, but to get it to work, you either need to do what I have above or something like:
if word=="belize" or word=="cambodge" or word=="mexique":  # etc