How to change the spelling language for iWeb and Pages?

I am constantly writing in Spanish and English. For example right now I need an English spell checker for Safari, so I just go to Edit -> Spelling -> Spelling... and select English from the drop-down menu and that's it.

However in iWeb and Pages, there is no drop-down menu for languages which makes me very very mad. How do you go about changing the spelling language in these two programs!?!? 😡

Thanks for the Pages tip, I had no idea it was there. 🙂