Translating "Add new Event now"
There is a bug in the translation of the widget to create a new event.
You should modify the file /includes/events/widgets.php
echo html_link( $url, __( 'Add an event now', APP_TD ) )
It should be:
echo html_link( $url, __( 'Add an Event now', APP_TD ) );
Otherwise, the .mo is not working