This is a good idea which deserves to be upgraded. This could be a good tool for multi sites management. However, I regret my money. This is a beta version, many bugs. It doesn't worth buying it now as developer seems to leave this project starving.
A very good job and a simple alternative to joomfish or falang. My multilangual sites are simple, so instead of an article per language, I use 1 article with n3t Language Filter tags.
Very clever extension!