By default the application contains the ISO 639-1 and ISO 639-2 language abbreviation lists. With these lists, you can make your own My languages list. This is a completely custom list. To add a language to the list select the language in the ISO Languages list and then click the Add Selected button in the ribbon. You can also add a custom language to your language list by clicking the + icon on the bottom of the My Languages list. Then define the name if the language and the abbreviation to use as Display Text.
Figure 1-67 Language lists in the CoCon Interpretation application