I don’t know. It depends of the extensibility of POedit. You should ask to them.

Anyway, as I said before, there are thousands of softwares who edit texts, and I haven’t the means nor the desire to create an extension to all of them.

At the moment, the only softwares officially supported are LibreOffice, Firefox, Thunderbird (and Chrome).

You should have a look to what is done to use Grammalecte with other softwares: