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International SEO · Accept-Language evidence

Compare how one URL responds to different language requests

Send controlled Accept-Language headers to a public page and compare status codes, redirect paths, final URLs, language headers, HTML lang, canonicals, robots directives, source text fingerprints, hreflang, and cache Vary evidence.

REQUESTS6 MAXHTML2 MB EACHGEOLOCATIONNOT USED

OpenWebmaster sends public, non-credentialed HTML requests. It does not use cookies, account state, geolocation, JavaScript rendering, translation review, search-engine selection, rankings, traffic, or personalization claims.

LANGUAGE REQUESTS

Choose the headers to compare

LabelAccept-Language headerVariant idAction
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Ready to compare language delivery.

No sample locale result, translation score, ranking promise, crawler verdict, traffic estimate, or invented market signal appears before live responses are checked.

International SEO workflow

Use language negotiation carefully

Prefer stable localized URLs

If a page has translated or regional equivalents, make each version directly reachable and connect the set with hreflang. Avoid hiding content behind forced language redirects.

Declare cache behavior

When the same URL changes by Accept-Language, shared caches need the right Vary header. Otherwise one visitor or crawler can receive another language’s response.

Separate signals from quality

This checker shows response differences. Human review still decides whether the translation, tone, regional targeting, and page experience are right.