This plugin fully disables XML-RPC support (Remote publishing, trackbacks, jetpack, whatnot) by deactivating all the registered methods (In more modern terminology they are equivalent to end point in REST type of API).
A client application can still send XML-RPC messages to the server but it will get a response similar to “I Have no idea what you are asking me to do”
Supported wordpress versions
3.5 and above
Can be network activated or dropped into the mu-plugins directory
There is nothing to localize