The Kanohi Rau was the Kanohi Mask of Translation. The Great Rau allowed its user to understand both written and spoken languages. The Noble Rau allowed translation of written languages only.1
Notes
The Rau was the Noble Mask of Translation. It allowed the user to read the ancient languages, runes, and symbols.2
The Kanohi Rau was the Noble Mask of Translation. It allowed its wearer to read ancient languages, runes, and symbols.3
The Great Kanohi Rau allowed the user to translate and communicate in any written or spoken language.4
Rau were created from Kanoka disks with the removes poison and enlarge powers.5
A Rau would not help its user understand idioms in the languages it translated.6