The standard IDE actions that are available are as follows:
build, clean, javadoc, rebuild and test.

You can not create additional actions and call them with a capital letter.
The standard IDE actions associated with the functions of I18N or L10n.

https://netbeans.org/kb/articles/freeform-config.html#in_file
http://en.wikipedia.org/wiki/Internationalization_and_localization