Downloading System Language 1.1 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The application lies within System Tools, more precisely General. We recommend checking the downloaded files with any free antivirus. This free Mac app is a product of Microcosm Software.
From the developer:
System Language is an Applescript extension that allows a scripter to determine what language is being used by the system on which the script is running. A numerical language code, or the name of the language in plain text is returned based on how System language is called by the scripter. One possible use of System Language might be to allow scripts to automatically detect and adjust to running on systems in different languages.
You may want to check out more software for Mac, such as App Language Chooser, TinkerTool System or System-i DBcompare Lite, which might be related to System Language.