Unlike the rest of the country, state law in Louisiana is based on the Napoleonic Code, inherited from its time as a French colony.
See:
... against teeth, like Spanish) (t, th, d, dh, n) Labial (with the lips[?]) (p, ph, b, bh, m) It also has four semivowels: y, r, l, v. All of these but r hav ...