  We construct Wakimoto modules for twisted affine Lie algebras, and interpret
the construction in terms of vertex algebras and their twisted modules. Using
the Wakimoto realization, we prove the Kac-Kazhdan conjecture on the characters
of irreducible modules with generic critical highest weights in the twisted
case. We provide explicit formulas for the twisted fields in the case of the
twisted affine algebra A^{(2)}_{2}.
