diff --git a/mod/admin.php b/mod/admin.php
index 4544917010..a3df2d262d 100644
--- a/mod/admin.php
+++ b/mod/admin.php
@@ -10,6 +10,7 @@ use Friendica\Content\Feature;
 use Friendica\Content\Text\Markdown;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
+use Friendica\Core\L10n;
 use Friendica\Core\System;
 use Friendica\Core\Theme;
 use Friendica\Core\Worker;
@@ -1129,7 +1130,7 @@ function admin_page_site_post(App $a)
 function admin_page_site(App $a)
 {
 	/* Installed langs */
-	$lang_choices = get_available_languages();
+	$lang_choices = L10n::getAvailableLanguages();
 
 	if (strlen(Config::get('system', 'directory_submit_url')) &&
 		!strlen(Config::get('system', 'directory'))) {
diff --git a/mod/install.php b/mod/install.php
index b39e7c949a..b0955fdedd 100644
--- a/mod/install.php
+++ b/mod/install.php
@@ -3,6 +3,7 @@
  * @file mod/install.php
  */
 use Friendica\App;
+use Friendica\Core\L10n;
 use Friendica\Core\System;
 use Friendica\Database\DBM;
 use Friendica\Database\DBStructure;
@@ -259,7 +260,7 @@ function install_content(App $a) {
 			$adminmail = notags(trim($_POST['adminmail']));
 			$timezone = ((x($_POST, 'timezone')) ? ($_POST['timezone']) : 'America/Los_Angeles');
 			/* Installed langs */
-			$lang_choices = get_available_languages();
+			$lang_choices = L10n::getAvailableLanguages();
 
 			$tpl = get_markup_template('install_settings.tpl');
 			$o .= replace_macros($tpl, [
diff --git a/mod/settings.php b/mod/settings.php
index 5193c4a046..50588e3c67 100644
--- a/mod/settings.php
+++ b/mod/settings.php
@@ -8,6 +8,7 @@ use Friendica\Content\Feature;
 use Friendica\Content\Nav;
 use Friendica\Core\Addon;
 use Friendica\Core\Config;
+use Friendica\Core\L10n;
 use Friendica\Core\PConfig;
 use Friendica\Core\System;
 use Friendica\Core\Worker;
@@ -1186,7 +1187,7 @@ function settings_content(App $a)
 	}
 
 	/* Installed langs */
-	$lang_choices = get_available_languages();
+	$lang_choices = L10n::getAvailableLanguages();
 
 	/// @TODO Fix indending (or so)
 	$o .= replace_macros($stpl, [
diff --git a/src/Core/L10n.php b/src/Core/L10n.php
index 4fe15b504b..7e079ea6d7 100644
--- a/src/Core/L10n.php
+++ b/src/Core/L10n.php
@@ -7,6 +7,7 @@ namespace Friendica\Core;
 use Friendica\Core\Config;
 use dba;
 
+require_once 'boot.php';
 require_once 'include/dba.php';
 
 /**
@@ -183,14 +184,14 @@ class L10n
 			if (is_array($t)) {
 				$plural_function = 'string_plural_select_' . str_replace('-', '_', $lang);
 				if (function_exists($plural_function)) {
-					$plural_function = 'string_plural_select_default';
+					$plural_function = 'self::stringPluralSelectDefault';
 				}
 				$i = $plural_function($count);
 				$s = $t[$i];
 			} else {
 				$s = $t;
 			}
-		} elseif (string_plural_select_default($count)) {
+		} elseif (self::stringPluralSelectDefault($count)) {
 			$s = $plural;
 		} else {
 			$s = $singular;
@@ -201,9 +202,10 @@ class L10n
 		return $s;
 	}
 
-	// provide a fallback which will not collide with
-	// a function defined in any language file
-	function string_plural_select_default($n)
+	/**
+	 * Provide a fallback which will not collide with a function defined in any language file
+	 */
+	private static function stringPluralSelectDefault($n)
 	{
 		return $n != 1;
 	}
@@ -221,7 +223,8 @@ class L10n
 	 *
 	 * @return array
 	 */
-	function get_available_languages() {
+	public static function getAvailableLanguages()
+	{
 		$langs = [];
 		$strings_file_paths = glob('view/lang/*/strings.php');