ISO based media file format derived formats such as Apples MOV and MPEG’s MP4 pack language infromation in 16bit binaries. How these language codes are packed varies though from format to format, Apple has a table of QuickTime language codes that they enforce in the MOV format while MP4 uses a technique of packing 3 character ISO 639-2/T language codes into 3 unsigned 5 bit integers that they then shift and add