1.2.6 Language bug?!

Why can't insert an new language in the latest version 1.2.6? There is always the default language?
It works if will be inserted the new language directory (deutsch) and the language filename (deutsch) at the default language.

Once you enter the new language code (de) at the default language is the following error.

Notice: Undefined index: in ..\system\library\language.php on line 36

Notice: Undefined index: in ..\system\library\language.php on line 61
Error: Could not load language !

x2!

I installed another language (brasilian-portuguese), but then I cant change the default language (english).

How can I do that?

Thanks!!

anyone?

How I change the default langiage???

THANKS

One thing to know, if your shop is set to run in brasilian( Brasilian flag activated) then your admin cart will be in Brasilian too. To have the admin cart back to english, you have to activate the english flag in the shop.
It will be interresting to have the possibility to unlink the two parts so the admin. and shop could be set up independantly.