Yes, you can downgrade to the older version and then upgrade once again with uploading required languages....

OR you can upload your languages without downgrading - for that you'll need special soft (NavCoder for example http://www.xoutpost.com/navigation-sy...-released.html ) and upload required modules.

If required language is alredy exist in language pack of your navi but you made some changes and want to upload it to your navi - downgrading and upgrading (without soft) could be used. If you trying to upload language which is not in language set of your nav - soft is required definately so you can use second method.

BUT BEFORE YOU START - read about specific fof MK3 devices!!!! It's very sensitive to navi soft!!! And everything what you are doing is for your oun risk!!!

Good luck!