This product is not so bad. I have importet fr. a german WP into a german Joomla database.
Now I have to change all the special characters in all posts. In German we have A, Ä, ä s, S, ß. And some additional "spaces" which have to be set to have a better block-format are now AA.
This is also in the usernames.
It would be a good service for other languages. Thanks