Language & encoding
A valid BCP 47 <html lang> and an early UTF-8 <meta charset> so agents read the text correctly. (page-parsed)
Broken variant
lang="english" (not BCP 47) and a non-UTF-8 charset declared past the first 1024 bytes.
Defect metrics
langMissing |
langInvalidBcp47 |
charsetMissing |
charsetNonUtf8 |
charsetLate |