The Language Editor is to create you own Languages, edit ones you have already made, and in the future will allow you to edit existing Languages (from other data/list files).
The New button will allow the creation of a new Language.
The Edit button will allow you to edit the selected Language (Languages created within this Language Editor only at this stage).
The Delete button will remove the selected Language (Languages created within this Language Editor only at this stage).
The Copy button makes a copy of a selected Language. In this way you can slightly modify an existing Language and give it a new name.
The Close button will allow you to exit back to PCGen.
Languages added will be saved into the customLanguages.lst file.