Since this gem appears to use Google's public API, one important thing to keep in mind is that there's probably a hard limit on the amount of text that can be translated at one go. I've found that throwing more than a thousand or so characters at GT's API results in their server throwing "URI too long" errors, since it only works via HTTP GET.<p>Disclaimer: This might have changed in the five or six months since I last messed around with Google's API, or, alternatively, this gem could be doing something clever to try and get around the problem. Either way, I'd suggest checking it out.