I changed some things, added a description (it would be great if someone could add a note _why_ we want to do that :)) and added some links. One thing I don't get (probably there's omething missing?) is the first task, especially what do you mean with that part:

and keyAlgorithm: legacy if it is not specified

If that is clarified, I'll create a task in GCI, if you want :)

Simple algorithm produces shorter page titles and shorter titles are nicer in many places where the titles can appear. The part you quoted should include word add.

I will mentor this for Google-Code-in-2017

@Nikerabbit Great, thanks for explanation and for the missing add, makes much more sense now :)

Imported as: https://codein.withgoogle.com/dashboard/tasks/5707423769690112/

@rosalieper: I already sent you an invitation to become a mentor in Google Code-in, so I could assign you as a mentor in the task, too (for now, my name is written there). Would you like to accept it? :) Thanks in advance!

@Florian I have't seen the email till now. PLease could you resend the email?

@rosalieper I sent the invitation to the second e-mail mentioned on your MediaWiki user profile again :)

Thank you. seen. Sorry the first email on my profile had a typo

*wohoo* :) Added you as a mentor to this task!

Change 400613 had a related patch set uploaded (by Phantom42; owner: Phantom42):
[translatewiki@master] Update groups GettextFFS keyAlgorithm

https://gerrit.wikimedia.org/r/400613

I just pushed a change to translatewiki.net repo. That patch removes keyAlgorithm: simple and adds keyAlgorithm: legacy (if it was not specified) for all groups which use GettextFFS class.

Change 400614 had a related patch set uploaded (by Phantom42; owner: Phantom42):
[mediawiki/extensions/Translate@master] Migrate GettextFFS keyAlgorithm default value to simple

https://gerrit.wikimedia.org/r/400614

And I pushed a second patch (to Translate extension) which changes default value keyAlgorithm to simple.

I checked MediaWiki Language Extension Bundle and Release workboards, however there is no next release task for MLEB, so I can't add needed information to release notes. I think we need to ask @Arrbee to create it?

Anyway, I am done with patches to translatewiki.net and Translate extension repos. If something needs to be changed / added / improved / removed, please tell and I will do it!

Change 400683 had a related patch set uploaded (by Phantom42; owner: Phantom42):
[translatewiki@master] Remove keyAlgorithm for some groups using GettextFFS

https://gerrit.wikimedia.org/r/400683

By @Nikerabbit recommendation, I split change to translatewiki.net repo into two separate patches. The first one ( https://gerrit.wikimedia.org/r/#/c/400613 ) adds keyAlgorithm: legacy for groups if it was not specified and the second ( https://gerrit.wikimedia.org/r/#/c/400683 ) removes keyAlgorithm: simple because it is not needed anymore.

Change 400613 merged by jenkins-bot:
[translatewiki@master] Set keyAlgorithm to legacy for some groups using GettextFFS

https://gerrit.wikimedia.org/r/400613

Change 400614 merged by jenkins-bot:
[mediawiki/extensions/Translate@master] Migrate GettextFFS keyAlgorithm default value to simple

https://gerrit.wikimedia.org/r/400614

Change 400683 merged by jenkins-bot:
[translatewiki@master] Remove keyAlgorithm for some groups using GettextFFS

https://gerrit.wikimedia.org/r/400683