i was told to use a program like PoEdit to create

i was told to use a program like PoEdit to create a customized language file. Language files can be used for that too; not just translations. See the Using Translations section on the following page for more:
https://premium.wpmudev.org/manuals/using-wpmu-dev/translations/

I have installed the PoEdit free version but i have no idea how to proceed as i am not programming base, even going through the link above.
The reason i join this membership is to hope getting some quick and simple solution.