From dd50896883ef3437b5267deaf2363fab7b523f82 Mon Sep 17 00:00:00 2001
From: Pone Z Pyo <phonezawphyo@gmail.com>
Date: Fri, 16 Jul 2021 18:48:17 +0900
Subject: [PATCH] fix mergeLocaleMessage change event related bug

---
 src/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/index.js b/src/index.js
index a23cd3e41..6b83e44e8 100644
--- a/src/index.js
+++ b/src/index.js
@@ -770,7 +770,7 @@ export default class VueI18n {
     }
     this._vm.$set(this._vm.messages, locale, merge(
       typeof this._vm.messages[locale] !== 'undefined' && Object.keys(this._vm.messages[locale]).length
-        ? this._vm.messages[locale]
+        ? Object.assign({}, this._vm.messages[locale])
         : {},
       message
     ))