About [[MediaWiki:Apihelp-donate-param-state/uk]]
Appearance
State as country (Germany, the UK, Japan, etc.) or state as region (California, Florida, Texas, etc.)?
Or maybe the abbreviation of "statement"?
No. It is state as region. Check MediaWiki:Donate interface-state-province/en
I suggest looking at the message group selecting all messages (translated or not) to see that message in context.