How will WordPress 4.0 language installation work I…

How will WordPress 4.0 language installation work? I probably did not understand it fully, so I am asking:

1) Localized version will be ready several days after release of WordPress 4.0. Which language pack will receive new users in the meantime? Older (and complete) 3.9 language version?

2) There will be any button, that localizationLocalization Localization (sometimes shortened to "l10n") is the process of adapting a product or service to a particular language, culture, and desired local "look-and-feel." is complete or there will be many different translations? I do not want to allow not finished localization for distribution.

3) When I change some stringsString A string is a translatable part of the software. A translation consists of a multitude of localized strings. in GlotPressGlotPress GlotPress is the translation management software that powers More information is available at, all users will be automatically updated (every day)?

There are only 2 week to WordPress 4.0 release and there is no discussion with translators how it should work. And also no detail information 🙁