diff --git a/features/language-plugin.feature b/features/language-plugin.feature
index c55a6647..2d4cb6ea 100644
--- a/features/language-plugin.feature
+++ b/features/language-plugin.feature
@@ -17,7 +17,6 @@ Feature: Manage translation files for a WordPress install
       | language  | english_name            | status        |
       | cs_CZ     | Czech                   | uninstalled   |
       | de_DE     | German                  | uninstalled   |
-      | en_US     | English (United States) | active        |
       | en_GB     | English (UK)            | uninstalled   |
 
     When I try `wp language plugin list not-a-plugin --format=json`
@@ -85,7 +84,6 @@ Feature: Manage translation files for a WordPress install
       | language  | english_name            | status      |
       | cs_CZ     | Czech                   | installed   |
       | de_DE     | German                  | installed   |
-      | en_US     | English (United States) | active      |
       | en_GB     | English (UK)            | installed   |
 
     When I run `wp language plugin list hello-dolly --fields=language,english_name,update`
@@ -93,7 +91,6 @@ Feature: Manage translation files for a WordPress install
       | language  | english_name            | update   |
       | cs_CZ     | Czech                   | none     |
       | de_DE     | German                  | none     |
-      | en_US     | English (United States) | none     |
       | en_GB     | English (UK)            | none     |
 
     When I run `wp language plugin list hello-dolly --status=installed --format=count`
diff --git a/features/language-theme.feature b/features/language-theme.feature
index b210ae8e..ef9cb7de 100644
--- a/features/language-theme.feature
+++ b/features/language-theme.feature
@@ -16,7 +16,6 @@ Feature: Manage translation files for a WordPress install
       | language  | english_name            | status        |
       | cs_CZ     | Czech                   | uninstalled   |
       | de_DE     | German                  | uninstalled   |
-      | en_US     | English (United States) | active        |
       | en_GB     | English (UK)            | uninstalled   |
 
     When I try `wp language theme list not-a-theme --format=json`
@@ -85,7 +84,6 @@ Feature: Manage translation files for a WordPress install
       | cs_CZ     | Czech                   | installed   |
       | de_DE     | German                  | installed   |
       | en_GB     | English (UK)            | installed   |
-      | en_US     | English (United States) | active      |
 
     When I run `wp language theme list twentyten --fields=language,english_name,update`
     Then STDOUT should be a table containing rows:
@@ -119,7 +117,6 @@ Feature: Manage translation files for a WordPress install
       | language  | english_name            | status        |
       | cs_CZ     | Czech                   | installed     |
       | de_DE     | German                  | installed     |
-      | en_US     | English (United States) | installed     |
       | en_GB     | English (UK)            | active        |
 
     When I run `wp language theme uninstall twentyten cs_CZ de_DE`
diff --git a/src/WP_CLI/CommandWithTranslation.php b/src/WP_CLI/CommandWithTranslation.php
index ca4b2b9e..96ab675e 100644
--- a/src/WP_CLI/CommandWithTranslation.php
+++ b/src/WP_CLI/CommandWithTranslation.php
@@ -249,9 +249,11 @@ protected function download_language_pack( $download, $slug = null ) {
 	 * @return array
 	 */
 	protected function get_installed_languages( $slug = 'default' ) {
-		$available   = wp_get_installed_translations( $this->obj_type );
-		$available   = ! empty( $available[ $slug ] ) ? array_keys( $available[ $slug ] ) : array();
-		$available[] = 'en_US';
+		$available = wp_get_installed_translations( $this->obj_type );
+		$available = ! empty( $available[ $slug ] ) ? array_keys( $available[ $slug ] ) : array();
+		if ( 'core' === $this->obj_type ) {
+			$available[] = 'en_US';
+		}
 
 		return $available;
 	}