+------------------------+
   | messageproperties_key  |
   +------------------------+
   | key_id INT(11)         |
   | key VARCHAR(1024)      |
   | (possible audit cols)  |
   |                        +-------+         +-------------------------------+
   |                        |       |         | messageproperties_key_locale  |
   |                        |       |         +-------------------------------+
   |                        |       |         | key_locale_id INT(11)         |
   |                        |       |         | key_id INT(11) FK             |
   +------------------------+       |         | locale VARCHAR(32)            |
                                    |         | translation TEXT              |
                                    +---------+                               |
                                              |                               |
                                              |                               |
                                              |                               |
                                              |                               |
                                              +-------------------------------+