asked Her Majesty's Government:

Whether it is the Official Solicitor's practice, when conducting business with legal authorities or lawyers in a jurisdiction where English is not the first language, to use English or the language of the other jurisdiction.

Each case is considered by the Official Solicitor individually, but in general the Official Solicitor will write in the first language of the recipient of correspondence. However, in order to contain translation costs (whether payable from public or private funds) the Official Solicitor may respond in English where it appears the authority or lawyer concerned is fluent in English or has ready translation facilities.