1. An information processing apparatus, comprising: a computer comprising: a property processing unit configured to read a property of document data associated with a stored document and register the property; a document language identification unit configured to identify a language used in the document data of the stored document; a property language identification unit configured to identify a language used in a property value of the registered property entered with respect to the document data; and a translation unit configured to translate the property value entered with respect to the document data from the language used in the property value into the language used in the document data of the stored document when the language used in the property value is different from the language used in the document data of the stored document, wherein the property processing unit is further configured to display a notice to select a default language representing language information entered with respect to a property key of the registered property, and wherein the property processing unit comprises a registration unit configured to register information on the selected default language in association with the property value and the property key of the registered property.