Kilotest: Diagnoses of page language invalid violation by HTML element 1103 on Mozilla Foundation page

Here is how tools diagnose the page language invalid issue for HTML element 1103 of the Mozilla Foundation page.

Basics

• About the page language invalid issue
  • Why it matters: Speaking helper may mispronounce the document text
  • Priority: highest
  • Related WCAG standard: 3.1.1
• About the Mozilla Foundation page
  • URL: https://www.mozilla.org/en-US/
  • Tested on 2026-04-03 at 03:56
• About HTML element 1103
  • Take me there
  • Tag name: OPTION
  • Text: rumantsch
  • Start tag: <option lang="rm" value="rm">
  • XPath: /html/body/div[2]/footer[1]/div[2]/div[2]/div[1]/form[1]/select[1]/option[64]
  • Bounding box: x = 0, y = 0, width = 0, height = 0

Diagnoses

1. lang attributes have invalid values.

   Tool: WallyAX (Wally)

   Rule: Use valid values for lang attributes.