I18N: Add option to hide en_US locale in wp_dropdown_languages().

Props danieltj for initial patch.
Fixes #44494.


git-svn-id: https://develop.svn.wordpress.org/trunk@44514 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/l10n.php

@@ -124,6 +124,24 @@ class Tests_L10n extends WP_UnitTestCase {
 		$this->assertContains( '<option value="ja_JP" lang="ja">日本語</option>', $actual );
 	}
 
+	/**
+	 * @ticket 44494
+	 */
+	function test_wp_dropdown_languages_exclude_en_us() {
+		$args   = array(
+			'id'                       => 'foo',
+			'name'                     => 'bar',
+			'languages'                => array( 'de_DE' ),
+			'translations'             => $this->wp_dropdown_languages_filter(),
+			'selected'                 => 'de_DE',
+			'echo'                     => false,
+			'show_option_en_us'        => false,
+		);
+		$actual = wp_dropdown_languages( $args );
+
+		$this->assertNotContains( '<option value="" lang="en" data-installed="1">English (United States)</option>', $actual );
+	}
+
 	/**
 	 * @ticket 38632
 	 */