One possible, simpler solution for the "unified experience" issue while avoiding 404 errors might be... inserting `<link rel="stylesheet">` dynamically via Tabzilla. Because tabzilla.js is a Django template, we can detect if a locale-specific stylesheet is exists in the Python code. It doesn't work if the visitor has disabled JavaScript, but it works on all Tabzilla-ready sites, though they have to update their CSS to use the `X-LocaleSpecific` font-family.