Number of edits grew in European and South America language projects in Nov, December 2020. It's not present in Portuguese Wikipedia. We'd like to estimate the number of edits on Portuguese Wikipedia if not turning off IP editing.

This seems to assume whatever increased the edits in other wikis (which wikis?) would also have a similar result in ptwiki save for the requirement for account registration.

Are there reasons for this assumption? Do past increases in these wikis track with increases in ptwiki? Do decreases also track?
There are also current world events that have varying impacts in different communities, so I'd expect a lot more noise than usual in the stats.