hreflang language mismatch

INVALID_HREFLANG · warning

Invalid hreflang code

An hreflang attribute has an invalid language / region code.

HREFLANG_MISSING_SELF_REF · notice

Missing self-referential hreflang

An hreflang cluster must include a self-reference for each locale. This page omits its own.

HREFLANG_MISSING_X_DEFAULT · notice

Missing x-default hreflang

No x-default fallback is defined for users whose locale does not match any listed variant.

HREFLANG_POINTS_TO_BROKEN · error

hreflang target broken

An hreflang entry points at a 4xx / 5xx URL.