TYPO3 Core

It is not possible to create new Alternative Page Languages in the info module.
Additinally there are some other flaws as well:

Steps to reproduce

1. Create at least one system language
2. select a not yet localized page
3. go to info module
4. Choose Localization overview in the dropdown
5. Choose a specific language or ALL in the language dropdown

1. If you hover over the pencil behind the default label it states "Edit all page properties" but if you click it only a subset of properties are editable.
2. The plus icon behind the other language(s) states on hover: "Create new translation headers" when in fact a new page_language_overlay record is created.
3. If you dont check the checkbox and click on the plus sign you end up on an empty page with the abort and save icons on top having no functionality.
4. If you check the checkbox and click the plus icon you are on a page that states "Create new Alternative Page Language on page ..." but you cant save the record.