Silent multilingual SEO bugs: hreflang, JSON-LD errors that never show in logs

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A developer running a 12-language static search engine on Cloudflare Pages audited its machine-readable layer and discovered four SEO errors that produced no logs, no errors, and no visible page breakage. A geo-redirect was misconfigured to send most global visitors, including all English speakers, to the Hebrew homepage, a problem correctly solved using reciprocal hreflang tags rather than broader country-based redirects. The site's JSON-LD structured data had a hand-maintained language array that was four languages out of date, silently misrepresenting the site to crawlers and answer engines. The Organization.sameAs field, used to link verified profiles to the site for entity recognition, was also two years stale, omitting profiles created since its last update. The developer concluded that any structured data duplicating facts held elsewhere in a codebase should either be auto-generated from a source of truth or covered by an automated assertion test.

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