Comments
"primary" is not a very descriptive name for "If this code was chosen directly by the user." Suggest SelectedByHumanUserInPrimaryDataCaptureContext, if that's what it means.
or OriginallySelectedValue. Unclear whether "the user" means any user at any point or in some specific context. Or if this is just "NotTranslated" (or, preferably the
inverse, "Translation"). Or perhaps there are more than two modes (selected, inferred, translated, e.g.)

Grahame's Comments
how about 'selectedDirectly'?