As long as OSS note 25328 - Translation of standard/application texts isn't revoked, you have to consider specific development, e.g. consuming some available web service (e.g. google, babylon , systran or any available application in your system landscape)
Hint: AFAIK for maintenance and production order, the initial language was stored in main record, so you should first look for any suitable OSS note for your version?
Regards,
Raymond