\TrackLangProvidesResource{US}[2016/10/06 v1.2]

\providecommand*{\USunits}{%
  \renewcommand*{\weightunit}{lb}%
  \renewcommand*{\lengthunit}{in}%
  \renewcommand*{\currencyunit}{USD}%
}

\TrackLangAddToCaptions\USunits