Adds a button to repeatedly translate back to the original language and target language until it stabilizes.
Helps you play around with Google Translate.
To use this it is probably best to turn off automatic, instant,
translation. Add your input text, choose the input and output
languages, translate once and then click the 'Translate until stable'
link. The script will then back translate to the input language and
then forward again, it will keep doing this until the back translation
matches the original input text or it enters a loop.
For major European languages it will often take only one step and the
back translation is identical to the input. If you have odd spacing
or line breaks it might take one or two extra steps. But for
languages with smaller corpora (from Google's point of view) it can
take quite a number of steps and the final version can be quite
different from the original.
