This audit is for an independent consultant or small consulting practice that already has Spanish-language or multilingual pages live and needs to determine why those pages are not being discovered, selected, or used as expected. It is also useful before expanding into another Spanish-speaking market, because the audit can reveal whether the current architecture is stable enough to support another language-region version.
Use the audit when Search Console shows Spanish-language impressions without the expected landing pages, when English pages appear for Spanish queries, when alternate-language pages have uncertain canonical or hreflang relationships, when translated pages have not received meaningful editorial localization, or when a recent migration changed URL paths, templates, or internal links.
The purpose is diagnosis, not activity. For every finding, record the evidence, the affected URL set, the likely consequence, the owner, the corrective action, and the validation method. A healthy result is not simply a crawler report with no warnings. It is a site where the intended language versions are technically accessible, semantically distinct where needed, internally coherent, and measurable in first-party search data.
Start with technical access because a localization problem cannot be evaluated cleanly when Google is being given contradictory canonical, indexability, or alternate-page signals. After the technical layer is understood, inspect search evidence, then content quality, then query overlap. This order reduces the risk of rewriting pages that are actually suffering from an architectural fault.
If the site launched or materially changed its Spanish section within the last 12 months, keep a dated change log before drawing conclusions from traffic movement. The date itself does not prove causation, but it helps distinguish pre-existing performance from changes introduced by a migration, template release, or language expansion.
Implementation guidance for validated findings remains in the Independent Consultants SEO Checklist. Use that resource after the audit identifies a specific failure rather than applying every possible fix to every page.