[[Template:Optional]]
Appearance
Fragment of a discussion from User talk:Shirayuki
It's because that MediaWiki:i18n-template-optional-1 and MediaWiki:i18n-template-optional-2 messages are not existed due to AbuseFilter problem. I'm sorry for breaking the translation.
Edit: I have reverted all my edits from the translations. I thought it could work for one language page, but it was disappointing.