This checklist is designed for organizations that already publish Spanish content, are preparing a Spanish-language launch, or need to audit a multilingual implementation that has become difficult to verify. It is especially useful when several teams share responsibility for development, content, localization, analytics, and regional operations.
Use it if you are building a bilingual site on one domain, supporting several Spanish-speaking markets, inheriting an implementation with unclear ownership, or trying to understand why Spanish pages are indexed but do not attract the expected queries or conversions.
Each item should produce evidence, not merely a yes-or-no opinion. Record the URL or configuration inspected, the pass or fail condition, severity, owner, corrective action, and validation method. If an item does not apply to your architecture or market, mark it not applicable and explain why so it is not mistaken for unfinished work.
The checklist is also useful as a gap-finder for mature sites. Instead of redoing everything, sample representative templates, priority commercial pages, regional variants, and high-impression Spanish URLs. Escalate from sampling to a full review only when the evidence shows a pattern.