I have Ubuntu installed in my laptop, with Catalan language support and I have properly set up my keyboard to the Spanish layout. However, every time I start Ubuntu, the keyboard language/layout has switched to English (I think) and I have to select the correct disposition again ("Es"). The tray icon, though, always shows "Es" as the input language, which, by the way, is the only option available.

Is there a way to tell Ubuntu to properly configure the keyboard?

Edit: Once I login, I always change the language using the top-left button on the tray (see the "[Es]" icon in the picture below:)