hreflang vs lang Consistency Checker

Two language declarations coexist on an internationalised page: the language attribute on the root element, saying what language the content is in, and the hreflang on alternate links, saying who each version serves. When the two disagree, the search engine receives contradictory information and a screen reader may pronounce the text with the wrong phonetics.

Enter both values and the page compares them. It distinguishes three situations: identical, the desired case; same base language with different regions, which is a warning rather than necessarily an error; and different languages, which is a genuine inconsistency. The distinction matters because Brazilian and European Portuguese, or American and British English, are legitimate cases of regional divergence.

Worth remembering the formatting rules: the language code goes lowercase and the region uppercase, hyphen-separated — the comparison here normalises case, but validation tools complain. And hreflang is reciprocal: if page A points at B, then B must point back at A, or the search engine ignores the pair entirely.