Comment 9 for bug 1276072

It's probably the write protection that prevents the system from remembering the language. Why on earth do you want that?

* Make it editable.
* Use Language Support to change the language somehow, and instantly change it back.

That way accountsservice should save the language, and you don't need to actively select it before logging in. Let us know if that doesn't help.

Use the "Apply system-wide" button in Language Support to make your language the default language for the system. (That will save things in /etc/default/locale.)