  Flavor symmetries that explain masses and mixings of the standard model
fermions dictate flavor patterns for the couplings of scalar and vector
leptoquarks to the standard model fermions. A generic feature is that couplings
to $SU(2)$-doublet leptons are suppressed at least by one spurion of the
discrete non-abelian symmetry breaking, responsible for neutrino mixing, while
couplings to charged lepton singlets can be order one. We obtain testable
patterns including those that predominantly couple to a single lepton flavor,
or two, or in a skewed way. They induce lepton non-universality, which we
contrast to current anomalies in $B$-decays. We find maximal effects in $R_{D}$
and $R_{D^*}$ at the level of $\sim$10 percent and few percent, respectively,
while leptoquark effects in $R_{K^{(*)}}$ can reach order few$\times 10$
percent. Predictions for charm and kaon decays and $\mu-e$ conversion are
worked out.
