A printing apparatus is supplied, capable of continuing print process by switching to other PDL automatically when error occurs in PDL process execution. In the printing apparatus, an interpreting and making section interprets print data on the basis of language format and makes output use data; a detecting section detects an occurrence of error in the interpreting and making section; a priority order information storing section previously stores priority order information representing a priority order to correspond to each language format information; a reading and selecting section reads out the corresponding priority order information on the basis of the language format information, and selects a change language format on the basis of the priority order information; a changing section changes the print data and the language format information into change print data and change language format information; and a controlling section controls the interpreting and making section to execute an interpretation of the change print data and a making of output use data based on the change language format.