Well, Google has discontinued their 'Google Translate API v2' so now, if that's how you're getting your website translated (as I did) then it won't work for you anymore.
Not to worry. I actually wrote my first Joomla Module, and it works (for v1.7.3)!
It's basically a wrapper around the new code that Google provides.
How to use it:
1) Download it from HERE
2) Using Joomla 1.7, install it using the extensions manager (There is now a module for J1.5 too!)
3) Go to Module Manager, and create/add a new 'Smug Translate' module, and place it on your site. (It's like any other module; Enable the module, place it in a valid module position for your template, and make it available on all pages!)
4) That's really about it. Save it, and check it out!
I'd appreciate hearing from you.
On January 25th, I received a modified file from Chris Potter of http://chris-potter.co.uk. Chris' file is compatible with Joomla 1.5! It is included in the download file; there are two files included - 1.5 and 1.7 please use the one pertinent to your joomla installation.