Adding i18n translations to the form

I want to be able to change the wording without overriding the entire form.  Added i18N to the buttons and the text so that is possible.
I notice that we capitalize "Collection" in create, update, and create_new but not in select_heading, no_collections, or title.  Is this because the former set are in buttons and the latter are in para/header text?  Worth making this consistent?