Change 309950 had a related patch set uploaded (by Legoktm):
Allow reading Babel information from a central API

https://gerrit.wikimedia.org/r/309950

There was a task for the API: T122000: Access user language preferences (including Babel) via standard API

Change 309950 merged by jenkins-bot:
Allow reading Babel information from a central API

https://gerrit.wikimedia.org/r/309950

In T95877#2661625, @Nemo_bis wrote:

There was a task for the API: T122000: Access user language preferences (including Babel) via standard API

I didn't know about that, thanks for the pointer, I've commented there.

All the patches have been merged now \o/ once wmf.21 is deployed, I'll work on configuring the different settings and announcement stuffs.

Can this be enabled in Wikimedia projects after T145366 is resolved? Are there any other blockers?

• https://gerrit.wikimedia.org/r/#/c/364346/ (use Babel cache in Wikibase) - blocker, otherwise there will be a performance regression
• https://gerrit.wikimedia.org/r/#/c/364347/ / T159214 (normalize language code) - nice to have, not a blocker

That's all that's left I think.

I think both of those patches have been deployed. So once T145366 is resolved, the next step would be to set:

$wgBabelCentralDb = 'metawiki';
$wgBabelCentralApi = 'https://meta.wikimedia.org/w/api.php';

for all SUL wikis in InitialiseSettings.php.

All patches are merged and it seems it works just fine now. I close this as resolved, feel free to re-open if the problem persists

@Lea_Lacroix_WMDE for what I see the problem seems to be that the new tables are populated only for meta. If a local user page is used instead of a global user page a null edit in the user page fixes the problem. Maybe the script used to populate the tables on meta should be used also in Wikidata (and in all the other wikis if the babel info is used also in those wikis for something)?

Null edit of my user page https://www.wikidata.org/wiki/User:Vinkje83 does not solve the problem.

In T95877#3503345, @Vinkje83 wrote:

Null edit of my user page https://www.wikidata.org/wiki/User:Vinkje83 does not solve the problem.

You're not using the Babel extension. You've manually added your userpage to the language categories. You need to add the languages using {{#babel:...|...}}.

Added Babel box. Solved the problem. Thanks.

@Lea_Lacroix_WMDE are any other users still having problems?

@Legoktm Yes, Envlh https://www.wikidata.org/wiki/User:Envlh just told me that he still has the problem.

Sorry, I didn't see this task as I wasn't added to it. The problem was solved for me a few hours/days later in August. Thanks :)

Thanks to @Envlh for confirming, and thanks to @Legoktm and everybody else who worked on this.

As far as I know, this is resolved. Please reopen if needed.