Hey @alexschomb. The pages will not show up in collections because as stated in Ghost docs: " To display all posts contained within them on a paginated index route". Pages are not included in collections.
More details here on how collections work can be found here:
Besides, is there any solution on how to automatically serve the correct content (page or post) based on the Accept-Language browser header in Ghost? (Otherwise I’ll try to hack something with nginx.)
Ghost doesn’t respect Accept-Language header at the moment.
And what about a language selector on the blog post or page to switch languages for the current post/page?
You’d need to put that into your theme manually.
Good thread with some more information on how to organize your multi-lingual site can be found here - I18n and custom theme - #3 by takka
Hope this helps ;)