  We study a holographic model where translations are both spontaneously and
explicitly broken, leading to the presence of (pseudo)-phonons in the spectrum.
The weak explicit breaking is due to two independent mechanisms: a small source
for the condensate itself and additional linearly space-dependent marginal
operators. The low energy dynamics of the model is described by Wigner crystal
hydrodynamics. In absence of a source for the condensate, the phonons remain
gapless, but momentum is relaxed. Turning on a source for the condensate damps
and pins the phonons. Finally, we verify that the universal relation between
the phonon damping rate, mass and diffusivity reported in arXiv:1812.08118
continues to hold in this model for weak enough explicit breaking.
