diff --git a/api/ApiEchoMarkRead.php b/api/ApiEchoMarkRead.php
index cde577b31..1a70f236b 100644
--- a/api/ApiEchoMarkRead.php
+++ b/api/ApiEchoMarkRead.php
@@ -65,7 +65,6 @@ class ApiEchoMarkRead extends ApiBase {
 			'token' => array(
 				ApiBase::PARAM_REQUIRED => true,
 			),
-			'uselang' => null
 		);
 	}
 
@@ -78,7 +77,6 @@ class ApiEchoMarkRead extends ApiBase {
 			'all' => "If set to true, marks all of a user's notifications as read",
 			'sections' => 'A list of sections to mark as read',
 			'token' => 'edit token',
-			'uselang' => 'the desired language to format the output'
 		);
 	}
 
diff --git a/api/ApiEchoNotifications.php b/api/ApiEchoNotifications.php
index ab31415ec..20c47c7ae 100644
--- a/api/ApiEchoNotifications.php
+++ b/api/ApiEchoNotifications.php
@@ -250,7 +250,6 @@ class ApiEchoNotifications extends ApiQueryBase {
 				/** @todo Once support for MediaWiki < 1.25 is dropped, just use ApiBase::PARAM_HELP_MSG directly */
 				constant( 'ApiBase::PARAM_HELP_MSG' ) ?: '' => 'api-help-param-continue',
 			),
-			'uselang' => null
 		);
 		foreach ( $sections as $section ) {
 			$params[$section . 'continue'] = null;
@@ -276,7 +275,6 @@ class ApiEchoNotifications extends ApiQueryBase {
 			'continue' => 'When more results are available, use this to continue, this is used only when groupbysection is not set.',
 			'alertcontinue' => 'When more alert results are available, use this to continue.',
 			'messagecontinue' => 'When more message results are available, use this to continue.',
-			'uselang' => 'the desired language to format the output',
 			'alertunreadfirst' => 'Whether to show unread message notifications first',
 			'messageunreadfirst' => 'Whether to show unread alert notifications first'
 		);
diff --git a/i18n/en.json b/i18n/en.json
index e21ad8215..0056e5bbd 100644
--- a/i18n/en.json
+++ b/i18n/en.json
@@ -121,7 +121,6 @@
 	"apihelp-echomarkread-param-list": "A list of notification IDs to mark as read.",
 	"apihelp-echomarkread-param-all": "If set, marks all of a user's notifications as read.",
 	"apihelp-echomarkread-param-sections": "A list of sections to mark as read.",
-	"apihelp-echomarkread-param-uselang": "The desired language to format the output.",
 	"apihelp-echomarkread-example-1": "Mark notification 8 as read",
 	"apihelp-echomarkread-example-2": "Mark all notifications as read",
 	"apihelp-query+notifications-description": "Get notifications waiting for the current user.",
@@ -131,7 +130,6 @@
 	"apihelp-query+notifications-param-format": "If specified, notifications will be returned formatted this way.",
 	"apihelp-query+notifications-param-limit": "The maximum number of notifications to return.",
 	"apihelp-query+notifications-param-index": "If specified, a list of notification IDs, in order, will be returned.",
-	"apihelp-query+notifications-param-uselang": "The desired language to format the output.",
 	"apihelp-query+notifications-param-alertcontinue": "When more alert results are available, use this to continue.",
 	"apihelp-query+notifications-param-alertunreadfirst": "Whether to show unread message notifications first.",
 	"apihelp-query+notifications-param-messagecontinue": "When more message results are available, use this to continue.",