This page has <html lang="en">, but each section below
declares its own lang. Each section's fixi attributes
are resolved against its own language — Spanish in the Spanish
section, Japanese in the Japanese section, English at the top level.
A preprocessor that rewrites attributes before fixi reads them would have to commit to one language at preprocess time. loka resolves per-element at read-time, so mixed-language sections compose cleanly.