Clarify that we're taking about the submittoken api in requestToken

proposals/4183-submitToken-error-codes.md

@@ -34,9 +34,9 @@ Additionally specify that the following common error codes can be returned:
 
 HTTP status code 400 should also be used for both of these errors.
 
-Also change the C/S API's definition of [`POST
+Also change the correspomding submitYoken-like API given in the C/S API's definition of [`POST
 /_matrix/client/v3/account/3pid/email/requestToken`](https://spec.matrix.org/v1.11/client-server-api/#post_matrixclientv3account3pidemailrequesttoken)
-to specify that the endpoint is the same as the I/S API version in all ways, including response / error codes, rather than just parameters.
+to specify that both request and response parameters / error codes are the same as the I/S API version, rather than just parameters, apart from needing an I/S API token.
 
 ## Potential issues