  We study the concomitant breaking of spatial translations and dilatations in
Ginzburg-Landau-like models, where the dynamics responsible for the symmetry
breaking is described by an effective Mexican hat potential for spatial
gradients. We show that there are fractonic modes with either subdimensional
propagation or no propagation altogether, namely, immobility. Such class of
effective field theories encompasses instances of helical superfluids and
meta-fluids, where fractons can be connected to an emergent symmetry under
higher moment charges, leading in turns to the trivialization of some elastic
coefficients. The introduction of a finite charge density alters the mobility
properties of fractons and leads to a competition between the chemical
potential and the superfluid velocity in determining the gap of the dilaton.
The mobility of fractons can also be altered at zero density upon considering
additional higher-derivative terms.
