When using the multi-tree structure to i18n the pages, there is still the language chooser in the pages app.

Now, this chooser is useless and confusing for editors, if you use the multi-tree solution to structure the different languages.
But still, I want to use the i18n features of magnolia, e.g. to identify the current locale or to retrieve the localized descriptions of assets in the dam, so I can't disable i18n authoring support, globally.

So, it is necessary to configure the pages app to hide the language chooser.