Previously, Google used to launch specific algorithms in different regions. Such as Panda, it was launched in English regions at first. Afterwards, it was pushed to other languages. As Panda was related to quality content on the page, its language support took a longer time than usual. But in case of Penguin it was more about quality links, so content language wasn’t that important and that’s why it became a global launch.
Google’s Gary Illyes said that whenever Google launches a new algorithm, they try their best to ensure it is a global launch. He said on Twitter:
nowadays we’re working hard launching everywhere at once.
You can see the tweet below:
nowadays we're working hard launching everywhere at once
— Gary "鯨理" Illyes (@methode) January 26, 2017
It has been quite a time since Google has confirmed any algorithm update, even though we have covered many unofficial Google updates. So it seems that this is probably all theoretical for now.