* Change the message 'yourvariant' to a more descriptive one (might be a bit too...

* Change the message 'yourvariant' to a more descriptive one (might be a bit too long however), and remove it as an optional message. Also added a help message to explain it.
* Make getVariantname fallback to the language name, and use that in Preferences. Shouldn't change the names in practice, but is a more logical implementation imho.
* (Fix a typo in Language.php)