Yes, disregard my entire argumentation for the way government forms are organized. Correct. I can't find what I remembered in the 90's. The article however refers to prior to 97 the single question was two SEPARATE forms. Reread the article. Regardless the disaggregation of grouped identities provides clarity whereas the aggregation of "People who speak Spanish" does not. Pedantry is about improving clarity. Siding with the expert class about arbitrary distinctions is being annoying.
To be succinct my mistake was that in reading the separate forms 25 years ago the government MUST have been redundant when using ethnicity and race interchangeably because no sane person would delineate "Speaks Spanish" as it's own separate true/false ethnic purity test for clarity. I assumed they meant race because the other option is asinine.