1. there's a class wrapping available for that "only_thislanguage" which will make a segment only show in a given language, you can probably add a code similar to the current tp_language meta handling in posts which will allow posts to be wrapped by this class and therefor do as you wished

Make this proper case.
1. There's a class wrapping available for that "only_thislanguage" which will make a segment only show in a given language, you can probably add a code similar to the current tp_language meta handling in posts which will allow posts to be wrapped by this class and therefor do as you wished