Hi!
One approach is as outlined here. You might take a more universal approach to the problem though, something like this:
add_filter( 'gettext', 'replace_events_keyword_everywhere' );
function replace_events_keyword_everywhere( $text ) {
$text = str_replace( 'events', 'new keyword', $text );
return str_replace( 'Events', 'New Keyword', $text );
}
You could also take a more fine grained approach by setting up lots of individual filters or, if you really wanted to, by actually “translating” the plugin (but only changing the use of the Events keyword).
The above should give you a basic, working solution though – simply drop it into your theme’s functions.php file.
I hope that helps!