  We construct the chiral low-energy effective theory for 2+1+1 flavor lattice
QCD with twisted mass Wilson fermions. In contrast to existing results we
assume a heavy charm quark mass such that the D mesons are too heavy to appear
as degrees of freedom in the effective theory. As an application we compute the
kaon mass to 1-loop order in the LCE regime. The result contains a chiral
logarithm involving the neutral pion mass which has no analogue in continuum
ChPT.
