The error shown to a user blocked from Special:CreateAccount is less informative than other block errors:
By comparison, block messages shown when attempting to edit an article or send an email give extra details, such as the block ID for looking up the block, expiry time and whether the block is partial or sitewide.
This error uses 'cantcreateaccount-range-text' for any blocks against an IP range, and 'cantcreateaccount-text' for any other blocks (including user/IP blocks, sitewide/partial blocks, system blocks, composite blocks, etc).
Problems with this:
- This message assumes that there is a single user who made the block, which is not the case for system and composite blocks
- If the target is not an IP range, this message assumes that it is an IP address, leading to the confusing phrasing: "Account creation from this IP address (Blockable) [...]"
- The message does not contain information specific to the block type - e.g. reassurance that partially blocked users may be able to edit other pages
In other places where a block error is shown (e.g. on the edit page), the message is chosen from several possible messages, depending on various features of the block. The error shown here should use that logic too.