diff --git a/resources/common/components/MenuDropdown.less b/resources/common/components/MenuDropdown.less
index a1afa2a..3a47893 100644
--- a/resources/common/components/MenuDropdown.less
+++ b/resources/common/components/MenuDropdown.less
@@ -53,7 +53,7 @@
 		min-width: 100%;
 		position: absolute;
 		top: 2.5em;
-		right: -@border-width-base;
+		left: -@border-width-base;
 		margin: 0;
 		border: @border-width-base @border-style-base @border-color-base;
 		border-top-width: 0;
diff --git a/resources/skins.vector.styles/components/LanguageButton.less b/resources/skins.vector.styles/components/LanguageButton.less
index 1c15ad5..fc3d014 100644
--- a/resources/skins.vector.styles/components/LanguageButton.less
+++ b/resources/skins.vector.styles/components/LanguageButton.less
@@ -30,7 +30,8 @@
 
 	.vector-menu-content {
 		top: auto;
-		right: 0;
+		left: auto;
+		right: -@border-width-base;
 		// align borders of open menu align with button
 		.box-sizing( border-box );
 		max-height: 65vh;
diff --git a/resources/skins.vector.styles/layouts/screen.less b/resources/skins.vector.styles/layouts/screen.less
index 315456b..498dc05 100644
--- a/resources/skins.vector.styles/layouts/screen.less
+++ b/resources/skins.vector.styles/layouts/screen.less
@@ -239,6 +239,13 @@ body {
 
 #right-navigation {
 	float: right;
+
+	// Any dropdowns inside the right navigation in modern Vector (e.g. "more" menu).
+	// should be right-aligned to prevent horizontal scrolling.
+	.vector-menu-content {
+		left: auto;
+		right: -@border-width-base;
+	}
 }
 
 #p-personal {