Validating your language file - GeSHi/geshi-1.0 GitHub Wiki
Since GeSHi 1.0.8 there is a new script
langcheck.php in the contrib directory that scans all language files it finds in the geshi/ subdirectory of the GeSHi installation for mistakes.
Please make sure that your language does not contain any mistakes that this script shows you when sending in your language file for inclusion into the official release as this saves work for us when including your file. Also you can be sure your language file will work as expected once your language file validates correctly.