diff --git a/i18n/i18n.py b/i18n/i18n.py
index 00e91bf..dab3b0b 100644
--- a/i18n/i18n.py
+++ b/i18n/i18n.py
@@ -1,6 +1,7 @@
 import json
 import locale
 import os
+from configs import singleton_variable
 
 
 def load_language_list(language):
@@ -8,13 +9,13 @@ def load_language_list(language):
         language_list = json.load(f)
     return language_list
 
-
+@singleton_variable
 class I18nAuto:
     def __init__(self, language=None):
         if language in ["Auto", None]:
-            language = locale.getdefaultlocale()[
-                0
-            ]  # getlocale can't identify the system's language ((None, None))
+            language = locale.getdefaultlocale(
+                envvars=('LANG', 'LC_ALL', 'LC_CTYPE', 'LANGUAGE')
+            )[0]
         if not os.path.exists(f"./i18n/locale/{language}.json"):
             language = "en_US"
         self.language = language
@@ -24,4 +25,4 @@ class I18nAuto:
         return self.language_map.get(key, key)
 
     def __repr__(self):
-        return "Use Language: " + self.language
+        return "Language: " + self.language