You can even do that using the webbrowser:
translate using google translate or babelfish, and use the AT&T service to convert to wav files
http://www.research.att.com/~ttsweb/tts/demo.php#top
http://babelfish.altavista.com/tr

or use a python script to do that, but I don't know if AT&T would like you if you do that (read the end user license)