FaLang's interest in the new Joomla 2.5 translation system is based on the fact that it allows the same content to be translated without having to duplicate everything (menu, articles)
Fish2Falang is the component that allows you to transfer all elements from joomfish (joomla 15) to Falang. This component is Joomla 3 compatible. It must be used in conjunction with Spupgrade, migrateME....