The text used in OpenEdge messages is contained in the promsgs file. OpenEdge provides various language editions of the promsgs file in the OpenEdge/prolang subdirectories. Each file has an extension that identifies its language.

To run OpenEdge with a certain version of promsgs, set the PROMSGS environment variable to the appropriate file location. By default, OpenEdge retrieves messages from OpenEdge/promsgs.You can also change the PROMSGS language dynamically, from within your application.