With this extension its possible to create links to an explicity language of a page. These links can be created easily with the TYPO3 link popup window.
TYPO3 link popup with language flags. In this Screen German is the default language and on some pages there are translations for French.
The result of the TYPO3 link popup, which will be parsed in FE. If realurl is installed and loaded the link in FE will be transformed by realurl.
Here you find the step by step installation guide. installation