TO edit the button go to installed plugin, on wp email capture click Edit, edit the last page (on the right you have the list of the pages). The name of the page is: wp-email-capture/inc/display.php
This is the code you were looking for:
<input name=”Submit” type=”submit” value=”<?php _e(‘Submitsss’,’WPEC’); ?>” class=”wp-email-capture-submit” />
I already type -Submitsss- to show you where you can write whatever you want to see on the button.
