diff --git a/balises.py b/balises.py
index c83e12b..258d352 100755
--- a/balises.py
+++ b/balises.py
@@ -5,6 +5,7 @@ from configparser import ConfigParser
 import datetime as dt
 
 import bs4
+import locale
 import requests
 import os
 import urllib.parse
@@ -12,10 +13,6 @@ import urllib.parse
 from peewee import *
 from bottle import hook, request, route, run, view
 
-# Set the locale for all categories to the user’s default setting (eg. LANG
-# environment variable)
-import locale
-locale.setlocale(locale.LC_ALL, '')
 
 
 # ------------------------------------------------------------
@@ -144,6 +141,16 @@ def results_page():
                 start_time=time,
                 end_time = '{:0>2}:00'.format(hour+1))
 
+@hook('before_request')
+def set_locale():
+    """Set the locale for all categories to the first lang in Accept-Language
+    header. Default to fr_FR.UTF-8
+    """
+    accept_language = request.get_header('Accept-Language', 'fr-FR')
+    first_lang = accept_language.split(';')[0].split(',')[0]
+    lang = first_lang.translate(str.maketrans('-', '_')) + '.UTF-8'
+    locale.setlocale(locale.LC_ALL, lang)
+
 @hook('before_request')
 def connect_to_db():
     db.connect()