When guaranteed-non-disruptive data-center power maintenance takes down your Confluence database server, application servers that survive and reconnect may end up speaking in tongues. Specifically, the “Other Macros” screen in edit mode ended up in a mix of English and Polish. A rolling restart fixed it.
Markdown formatting and simple HTML accepted.
Sometimes you have to double-click to enter text in the form (interaction between Isso and Bootstrap?). Tab is more reliable.