Lang and xml:lang Must Match

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Quick Reference

Element Code: HT-026

Issue: lang and xml:lang differ

Impact: Conflicting signals

Fix: Make them match

Detection: HTML validation

What Is This Issue?

If using both, they must match.

Why This Matters

Mismatch creates confusion.

How to Fix

  1. Match values or remove xml:lang

Tools

  • HTML validator: Language check

TL;DR

Make lang and xml:lang match, or just use lang.

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