diff --git a/odoo/addons/base/models/res_lang.py b/odoo/addons/base/models/res_lang.py
index 54454fa54a3..fcc48476a49 100644
--- a/odoo/addons/base/models/res_lang.py
+++ b/odoo/addons/base/models/res_lang.py
@@ -139,7 +139,7 @@ class Lang(models.Model):
             except locale.Error:
                 continue
         if fail:
-            lc = locale.getdefaultlocale()[0]
+            lc = locale.getlocale()[0]
             msg = 'Unable to get information for locale %s. Information from the default locale (%s) have been used.'
             _logger.warning(msg, lang, lc)
 
diff --git a/odoo/tools/translate.py b/odoo/tools/translate.py
index 05407f7ef46..e22167bf384 100644
--- a/odoo/tools/translate.py
+++ b/odoo/tools/translate.py
@@ -1412,7 +1412,7 @@ def trans_load_data(cr, fileobj, fileformat, lang, verbose=True, overwrite=False
 
 def get_locales(lang=None):
     if lang is None:
-        lang = locale.getdefaultlocale()[0]
+        lang = locale.getlocale()[0]
 
     if os.name == 'nt':
         lang = _LOCALE2WIN32.get(lang, lang)