Heh, that's an excellent question. I was about to just say uca-default-u-kn, but then I read about the alphabet, and found that it has a rather unusual Latin order. See https://en.wikipedia.org/wiki/Karelian_alphabet#Current_Karelian_alphabet_.282007.E184.108.40.206 and notice that Z is after S, as well as some other oddities. I guess that it needs to be added to ICU or CLDR, or can it be added locally?
|operations/mediawiki-config : master||Define category collation for olo.wikipedia|
|Resolved||Dereckson||T146612 Create Livvi-Karelian Wikipedia at olo.wikipedia.org|
|Resolved||• MarcoAurelio||T147064 Determine category collation for Livvi-Karelian Wikipedia (olo.wikipedia.org)|
I've checked and there is no olo collation in CLDR.
We need to prepare one, based on https://en.wikipedia.org/wiki/Karelian_alphabet#Current_Karelian_alphabet_.282007.E220.127.116.11 information.
Meanwhile, uca-default is a safe fallback with Z as an issue.
Deployed and tested it looks there are no problems so far. Still it'd be better to have someday a uca-xx-olo category collation. Closing as resolved for now. Feel free to reopen if you disagree. Thanks.