  We study Lusztig's t-analog of weight multiplicities associated to level one
representations of twisted affine Kac-Moody algebras. An explicit closed form
expression is obtained for the corresponding t-string function using constant
term identities of Macdonald and Cherednik. The closed form involves the
generalized exponents of the graded pieces of the twisted affine algebra,
considered as modules for the underlying finite dimensional simple Lie algebra.
This extends previous work on level 1 t-string functions for the untwisted
simply-laced affine Kac-Moody algebras.
