Compact Language Detector 2 是 chrome 用來偵測目前網頁的使用的語言，提示使用者可以翻譯成目前使用的語言， 從網站的說明看是用 Naïve Bayesian classifier ， 然後有三種資料集當作分類的分數。

For Unicode scripts such as Greek and Thai that map one-to-one to detected languages, the script defines the result

For the 80,000+ character Han script and its CJK combination with Hiragana, Katakana, and Hangul scripts, single letters (unigrams) are scored

For all other scripts, sequences of four letters (quadgrams) are scored