diff --git a/Language/sv-SE/HTTP.php b/Language/sv-SE/HTTP.php
index e0f5e63d..f88434b6 100644
--- a/Language/sv-SE/HTTP.php
+++ b/Language/sv-SE/HTTP.php
@@ -18,6 +18,8 @@
 
     // IncomingRequest
     'invalidNegotiationType' => '"{0}" är inte en giltig negotiation typ. Den måste vara en av: media, charset, encoding, language.',
+    'invalidJSON'            => 'Kunde inte tolka JSON strängen. Fel: {0}',
+    'unsupportedJSONFormat'  => 'Det givna JSON formatet stödjs inte.',
 
     // Message
     'invalidHTTPProtocol' => 'Felaktigt HTTP Protocol Version. Måste bli en av: {0}',
diff --git a/Language/sv-SE/Language.php b/Language/sv-SE/Language.php
new file mode 100644
index 00000000..be15ff72
--- /dev/null
+++ b/Language/sv-SE/Language.php
@@ -0,0 +1,14 @@
+<?php
+
+/**
+ * This file is part of CodeIgniter 4 framework.
+ *
+ * (c) CodeIgniter Foundation <admin@codeigniter.com>
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+return [
+    'invalidMessageFormat' => 'Ogiltigt meddelandeformat: "{0}", argument: "{1}"',
+];