Language packs contain third-party translations of the TrueCrypt user interface texts. Some language packs also contain translated TrueCrypt User Guide. Note that language packs are currently supported only by the Windows version of TrueCrypt.
To install a language pack, follow these steps:
To revert to English, select Settings -> Language. Then select English and click OK.
By Andrew Y. (@andryou) - no affiliation with TrueCrypt - fair use - site for non-monetary, reference purposes only