<html lang> values, by primary language subtag

Analysis
1 
SELECT COUNT(*) AS num, lang FROM (
  SELECT page, url, REGEXP_EXTRACT(LOWER(body), r'<html\s(?:[^>]+\s)?lang\s*=\s*["\']?([a-z]+)') AS lang
  FROM [httparchive:har.2016_05_01_chrome_requests_bodies]
  WHERE LOWER(body) CONTAINS ' lang='
) WHERE lang != "null"
GROUP BY lang
ORDER BY num DESC

255 unique primary language subtags found, in 681,651 docs having <html lang> with non-empty value, out of a total of 17,551,160 documents (meaning, only 3.88% of documents had <html lang> at all, which is consistent with the data at https://www.chromestatus.com/metrics/feature/timeline/popularity/588).

1 Like
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Note that it’s that many resources, which includes CSS and JS files also. If you want to know how many are HTML you need to check contentType something in the JSON payload.