All text for the map and list is translation ready, and can be changed using po/mo files. A number of users have used the CodeStyling Localization plugin to translate Map List Pro easily from the WordPress Admin without the need to add or edit files directly.
The same technique can also be used to change English language text for buttons etc. A good tutorial on using the CodeStyling Localization plugin can be found here https://www.ostraining.com/blog/wordpress/language-strings-wordpress/
