diff --git a/searx/engines/bing.py b/searx/engines/bing.py
index b2ad7b6c..15c8ee61 100644
--- a/searx/engines/bing.py
+++ b/searx/engines/bing.py
@@ -33,8 +33,11 @@ def request(query, params):
     offset = (params['pageno'] - 1) * 10 + 1
 
     if params['language'] != 'all':
-        query = u'language:{} {}'.format(params['language'].split('-')[0].upper(),
-                                         query.decode('utf-8')).encode('utf-8')
+        lang = params['language'].split('-')[0].upper()
+    else:
+        lang = 'EN'
+
+    query = u'language:{} {}'.format(lang, query.decode('utf-8')).encode('utf-8')
 
     search_path = search_string.format(
         query=urlencode({'q': query}),
diff --git a/tests/unit/engines/test_bing.py b/tests/unit/engines/test_bing.py
index 61f8629d..a63b2e33 100644
--- a/tests/unit/engines/test_bing.py
+++ b/tests/unit/engines/test_bing.py
@@ -19,7 +19,7 @@ class TestBingEngine(SearxTestCase):
 
         dicto['language'] = 'all'
         params = bing.request(query, dicto)
-        self.assertTrue('language' not in params['url'])
+        self.assertTrue('language' in params['url'])
 
     def test_response(self):
         self.assertRaises(AttributeError, bing.response, None)