diff --git a/src/lib/i18n/index.ts b/src/lib/i18n/index.ts
index d7361a5e79..520f9337a2 100644
--- a/src/lib/i18n/index.ts
+++ b/src/lib/i18n/index.ts
@@ -14,8 +14,11 @@ const createI18nStore = (i18n: i18nType) => {
 		i18nWritable.set(i18n);
 	});
 	i18n.on('added', () => i18nWritable.set(i18n));
-	i18n.on('languageChanged', () => {
+	i18n.on('languageChanged', (lang) => {
 		i18nWritable.set(i18n);
+		if (typeof document !== 'undefined') {
+			document.documentElement.setAttribute('lang', lang);
+		}
 	});
 	return i18nWritable;
 };
@@ -67,9 +70,6 @@ export const initI18n = (defaultLocale?: string | undefined) => {
 				escapeValue: false // not needed for svelte as it escapes by default
 			}
 		});
-
-	const lang = i18next?.language || defaultLocale || 'en-US';
-	document.documentElement.setAttribute('lang', lang);
 };
 
 const i18n = createI18nStore(i18next);