Modifying how subscribe shortcode displays?

I'm using e-newsletter a bit unconventionally to record who and how many are "for" or "against" initiatives on this site, example: http://americansforsocialjustice.com/protect-promote-hemp-cultivation/

I would like to modify the shortcode output from:

[enewsletter_subscribe show_name="1" show_groups="0" subscribe_to_groups="1,2"]

...to read something like "Vote here:" rather than "Subscribe to:" along with changing the button text, and the notification that pops up for "saving..." and "Subscribes were saved!"

I know this is in the plugin's PHP somewhere, so I'm going to ask for a help finding where these need to be modified in the code. Your help is appreciated!

Thanks :slight_smile: