Internationalized the Add New x string on the add related record form.  Added the 'add_new_x' translation to the xataface translation spreadsheet so that it will be included in next release.  This change was prompted by the proposed patch from Hans here:
https://groups.google.com/d/msg/xataface/FKkpSjhC-XU/y30tx-lGZ7wJ
I have modified the solution to allow for placeholders rather than just translating the prefix phrase.