Use /de/ for DE

Author: LukasReschke

functions.php

@@ -15,4 +15,18 @@
 require_once locate_template('/lib/comments.php');        // Custom comments modifications
 require_once locate_template('/lib/relative-urls.php');   // Root relative URLs
 require_once locate_template('/lib/widgets.php');         // Sidebars and widgets
-require_once locate_template('/lib/custom.php');          // Custom functions
+require_once locate_template('/lib/custom.php');          // Custom functions
+
+function translationUrlFilter($url, $path, $orig_scheme, $blog_id) {
+	$path = parse_url(site_url())['path'];
+	$language = explode('/', substr($_SERVER['REQUEST_URI'], strlen($path)));
+	if(isset($language[1]) && $language[1] === 'de') {
+		$url = explode('/', $url);
+		$languageEntry = ['de'];
+		array_splice($url, 4, 0, $languageEntry);
+		return implode('/', $url);
+	}
+	return $url;
+}
+
+add_filter('home_url', 'translationUrlFilter');

l10n.php

@@ -41,10 +41,11 @@ private function getBaseTranslationFilePath() {
 	 * @return string
 	 */
 	private function getCurrentLanguage() {
-		if(isset($_GET['hl'])) {
-			$hl = strtolower((string)$_GET['hl']);
-			if(ctype_alnum($hl) && strlen($hl) === 2) {
-				return $hl;
+		$path = parse_url(site_url())['path'];
+		$language = explode('/', substr($_SERVER['REQUEST_URI'], strlen($path)));
+		if(isset($language[1]) && strlen($language[1]) === 2) {
+			if(ctype_alnum($language[1])) {
+				return $language[1];
 			}
 		}