  'Internal spacetime' is a modification of general relativity that was
recently introduced as an approximate spacetime geometric model of quantum
nonlocality. In an internal spacetime, time is stationary along the worldlines
of fundamental (dust) particles. Consequently, the dimensions of tangent spaces
at different points of spacetime vary, and spin wavefunction collapse is
modeled by the projection from one tangent space to another. In this article we
develop spinors on an internal spacetime, and construct a new Dirac-like
Lagrangian $\mathcal{L} = \bar{\psi}(i \slashed \partial - \hat{\omega}) \psi$
whose equations of motion describe their couplings and interactions.
Furthermore, we show that hidden within $\mathcal{L}$ is the entire standard
model: $\mathcal{L}$ contains precisely three generations of quarks and
leptons, the electroweak gauge bosons, the Higgs boson, and one new massive
spin-$2$ boson; gluons are considered in a companion article. Specifically, we
are able to derive the correct spin, electric charge, and color charge of each
standard model particle, as well as predict the existence of a new boson.
