... I know it's written in the TableTools.js - but I guess it's more helpful to include it in the internalisation options to avoid changing this text on every single update.
Yup - that is something which should be made an initialisation option in future. For the moment you can override it by putting in your own fnComplete function for the button:
Replies
http://datatables.net/extras/tabletools/button_options#fnComplete
https://github.com/DataTables/TableTools/blob/master/media/js/TableTools.js#L2204
Allan