From 881c7c4d181d31f2995a0de4533ff4a743ee9daf Mon Sep 17 00:00:00 2001
From: Julian Lam <julian@nodebb.org>
Date: Mon, 12 Sep 2022 13:01:19 -0400
Subject: [PATCH] fix: automatically remove `lang` parameter if it matches the
 forum default

---
 public/src/modules/messages.js | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/public/src/modules/messages.js b/public/src/modules/messages.js
index 724d6886f1..32017e329e 100644
--- a/public/src/modules/messages.js
+++ b/public/src/modules/messages.js
@@ -101,6 +101,11 @@ define('messages', ['bootbox', 'translator', 'storage', 'alerts', 'hooks'], func
 			params.delete('register');
 		}
 
+		if (params.has('lang') && params.get('lang') === config.defaultLang) {
+			console.info(`The "lang" parameter was passed in to set the language to "${params.get('lang')}", but that is already the forum default language.`);
+			params.delete('lang');
+		}
+
 		const qs = params.toString();
 		ajaxify.updateHistory(ajaxify.currentPage + (qs ? `?${qs}` : '') + document.location.hash, true);
 	}