Can I file a case against people talking bad about...

Please be kindly informed that, according to the information provided to us in your inquiry, and with reference to the Qatari Criminal Procedure Law, regarding the complaint and the filing of the case, it must be of a legal capacity and it is not permissible for it to be submitted by anyone else in the sense that it is not permissible to delegate the complaint and institute the case except from the owner of it and therefore it is not permissible for any person to initiate the lawsuit On behalf of his friend unless there is a legal power of attorney from him authorizing him to do so legally, otherwise, unfortunately, this is not permissible in general, and if you have any other purpose, you can clarify