diff --git a/phpBB/language/en/composer.json b/phpBB/language/en/composer.json
index aef3c41be7..95cb24718c 100644
--- a/phpBB/language/en/composer.json
+++ b/phpBB/language/en/composer.json
@@ -24,8 +24,8 @@
 		"local-name": "British English",
 		"phpbb-version": "4.0.0-a1-dev",
 		"direction": "ltr",
-		"user_lang": "en-gb",
-		"plural_rule": "1",
-		"recaptcha_lang": "en-GB"
+		"user-lang": "en-gb",
+		"plural-rule": "1",
+		"recaptcha-lang": "en-GB"
 	}
 }
diff --git a/phpBB/phpbb/language/language_file_helper.php b/phpBB/phpbb/language/language_file_helper.php
index e6966a3710..a6041eacb6 100644
--- a/phpBB/phpbb/language/language_file_helper.php
+++ b/phpBB/phpbb/language/language_file_helper.php
@@ -91,7 +91,7 @@ class language_file_helper
 	 */
 	protected function get_language_data_from_json(array $data) : array
 	{
-		if (!isset($data['extra']['language-iso']) || !isset($data['extra']['english-name']) || !isset($data['extra']['local-name']))
+		if (!isset($data['extra']['language-iso']) || !isset($data['extra']['english-name']) || !isset($data['extra']['local-name']) || !isset($data['extra']['direction']) || !isset($data['extra']['user-lang']) || !isset($data['extra']['plural-rule']) || !isset($data['extra']['recaptcha-lang']))
 		{
 			throw new DomainException('INVALID_LANGUAGE_PACK');
 		}
@@ -115,6 +115,10 @@ class language_file_helper
 			'author'		=> implode(', ', $authors),
 			'version'		=> $data['version'],
 			'phpbb_version'	=> $data['extra']['phpbb-version'],
+			'direction'		=> $data['extra']['direction'],
+			'user-lang'		=> $data['extra']['user-lang'],
+			'plural-rule'	=> $data['extra']['plural-rule'],
+			'recaptcha-lang'=> $data['extra']['recaptcha-lang'],
 		];
 	}
 }