"Bug" on the ultimate translate

Hi, it's probably not a real bug, but in this case it is... from what i understand the plugin get the original language from the blog language, right?
In this case it's not a good move, because we can have a blog in the english language, but write posts in other languages (french, german, etc), then the translation won't work (i've just tried, the "translated" english version is the same as the original)
You should give the ability to choose the original language in the config or use the autodetect language option.
How can i manually fix this until a new release of the plugin? (i cannot change the default blog language, it must be stay english)
thank