I put this here because it is about an addon for the Firefox browser, although useful for many other people. In Post 790357 Bowlie mentions a site called Nice Translator which I bookmarked for future use. As far as I can tell it does an acceptable (maybe more!) according to the recipients of my couple of uses. It'll come in handy in the future.
This morning I was horsing around with one such use and noticed the sidebar for a Fx addon, so I gave it a try. I caution other Fx users about it - not sure it's worth the trouble and clutter. Supposedly you highlight some text, call the translator and enter the appropriate language. I didn't work for me on a couple of attempts. Of course I may have done something out of sequence - that has happened before <blush>. It (the addon) also has fewer languages available, so I've uninstalled it.