Fixed #24230 -- Added translated language name for i18n template tag/filter.

django/templatetags/i18n.py

@@ -215,6 +215,7 @@ def do_get_language_info(parser, token):
         {% get_language_info for LANGUAGE_CODE as l %}
         {{ l.code }}
         {{ l.name }}
+        {{ l.name_translated }}
         {{ l.name_local }}
         {{ l.bidi|yesno:"bi-directional,uni-directional" }}
     """
@@ -238,6 +239,7 @@ def do_get_language_info_list(parser, token):
         {% for l in langs %}
           {{ l.code }}
           {{ l.name }}
+          {{ l.name_translated }}
           {{ l.name_local }}
           {{ l.bidi|yesno:"bi-directional,uni-directional" }}
         {% endfor %}
@@ -253,6 +255,12 @@ def language_name(lang_code):
     return translation.get_language_info(lang_code)['name']
 
 
+@register.filter
+def language_name_translated(lang_code):
+    english_name = translation.get_language_info(lang_code)['name']
+    return translation.ugettext(english_name)
+
+
 @register.filter
 def language_name_local(lang_code):
     return translation.get_language_info(lang_code)['name_local']

django/utils/translation/__init__.py

@@ -215,17 +215,22 @@ def get_language_info(lang_code):
     try:
         lang_info = LANG_INFO[lang_code]
         if 'fallback' in lang_info and 'name' not in lang_info:
-            return get_language_info(lang_info['fallback'][0])
-        return lang_info
+            info = get_language_info(lang_info['fallback'][0])
+        else:
+            info = lang_info
     except KeyError:
         if '-' not in lang_code:
             raise KeyError("Unknown language code %s." % lang_code)
         generic_lang_code = lang_code.split('-')[0]
         try:
-            return LANG_INFO[generic_lang_code]
+            info = LANG_INFO[generic_lang_code]
         except KeyError:
             raise KeyError("Unknown language code %s and %s." % (lang_code, generic_lang_code))
 
+    if info:
+        info['name_translated'] = ugettext_lazy(info['name'])
+    return info
+
 trim_whitespace_re = re.compile('\s*\n\s*')
 
 

docs/releases/1.9.txt

@@ -187,6 +187,10 @@ Internationalization
   for languages which can be written in different scripts, for example Latin
   and Cyrillic (e.g. ``be@latin``).
 
+* Added the ``name_translated`` attribute to the object returned by the
+  :ttag:`get_language_info` template tag. Also added a corresponding template
+  filter: :tfilter:`language_name_translated`.
+
 Management Commands
 ^^^^^^^^^^^^^^^^^^^
 

docs/spelling_wordlist

@@ -515,6 +515,7 @@ naturalday
 naturaltime
 nd
 needsinfo
+německy
 nestable
 neuroscientist
 newforms

docs/topics/i18n/translation.txt

@@ -870,6 +870,11 @@ You can then access the information::
     Name of language: {{ lang.name_local }}<br />
     Name in English: {{ lang.name }}<br />
     Bi-directional: {{ lang.bidi }}
+    Name in the active language: {{ lang.name_translated }}
+
+.. versionadded:: 1.9
+
+   The ``name_translated`` attribute was added.
 
 .. templatetag:: get_language_info_list
 
@@ -899,6 +904,7 @@ you can iterate over those languages in the template::
 .. templatefilter:: language_name
 .. templatefilter:: language_name_local
 .. templatefilter:: language_bidi
+.. templatefilter:: language_name_translated
 
 Template filters
 ~~~~~~~~~~~~~~~~
@@ -908,6 +914,11 @@ There are also simple filters available for convenience:
 * ``{{ LANGUAGE_CODE|language_name }}`` ("German")
 * ``{{ LANGUAGE_CODE|language_name_local }}`` ("Deutsch")
 * ``{{ LANGUAGE_CODE|language_bidi }}`` (False)
+* ``{{ LANGUAGE_CODE|language_name_translated }}`` ("německy", when active language is Czech)
+
+.. versionadded:: 1.9
+
+   The ``language_name_translated`` filter was added.
 
 .. _Django templates: ../templates_python/
 

tests/template_tests/syntax_tests/test_i18n.py

@@ -342,17 +342,26 @@ class I18nTagTests(SimpleTestCase):
         )
 
     @setup({'i18n32': '{% load i18n %}{{ "hu"|language_name }} '
-                      '{{ "hu"|language_name_local }} {{ "hu"|language_bidi }}'})
+                      '{{ "hu"|language_name_local }} {{ "hu"|language_bidi }} '
+                      '{{ "hu"|language_name_translated }}'})
     def test_i18n32(self):
         output = self.engine.render_to_string('i18n32')
-        self.assertEqual(output, 'Hungarian Magyar False')
+        self.assertEqual(output, 'Hungarian Magyar False Hungarian')
+
+        with translation.override('cs'):
+            output = self.engine.render_to_string('i18n32')
+            self.assertEqual(output, 'Hungarian Magyar False maďarsky')
 
     @setup({'i18n33': '{% load i18n %}'
                       '{{ langcode|language_name }} {{ langcode|language_name_local }} '
-                      '{{ langcode|language_bidi }}'})
+                      '{{ langcode|language_bidi }} {{ langcode|language_name_translated }}'})
     def test_i18n33(self):
         output = self.engine.render_to_string('i18n33', {'langcode': 'nl'})
-        self.assertEqual(output, 'Dutch Nederlands False')
+        self.assertEqual(output, 'Dutch Nederlands False Dutch')
+
+        with translation.override('cs'):
+            output = self.engine.render_to_string('i18n33', {'langcode': 'nl'})
+            self.assertEqual(output, 'Dutch Nederlands False nizozemsky')
 
     # blocktrans handling of variables which are not in the context.
     # this should work as if blocktrans was not there (#19915)
@@ -405,18 +414,26 @@ class I18nTagTests(SimpleTestCase):
     # Test whitespace in filter arguments
     @setup({'i18n38': '{% load i18n custom %}'
                       '{% get_language_info for "de"|noop:"x y" as l %}'
-                      '{{ l.code }}: {{ l.name }}/{{ l.name_local }} bidi={{ l.bidi }}'})
+                      '{{ l.code }}: {{ l.name }}/{{ l.name_local }}/'
+                      '{{ l.name_translated }} bidi={{ l.bidi }}'})
     def test_i18n38(self):
-        output = self.engine.render_to_string('i18n38')
-        self.assertEqual(output, 'de: German/Deutsch bidi=False')
+        with translation.override('cs'):
+            output = self.engine.render_to_string('i18n38')
+        self.assertEqual(output, 'de: German/Deutsch/německy bidi=False')
 
     @setup({'i18n38_2': '{% load i18n custom %}'
                         '{% get_language_info_list for langcodes|noop:"x y" as langs %}'
                         '{% for l in langs %}{{ l.code }}: {{ l.name }}/'
-                        '{{ l.name_local }} bidi={{ l.bidi }}; {% endfor %}'})
+                        '{{ l.name_local }}/{{ l.name_translated }} '
+                        'bidi={{ l.bidi }}; {% endfor %}'})
     def test_i18n38_2(self):
-        output = self.engine.render_to_string('i18n38_2', {'langcodes': ['it', 'no']})
-        self.assertEqual(output, 'it: Italian/italiano bidi=False; no: Norwegian/norsk bidi=False; ')
+        with translation.override('cs'):
+            output = self.engine.render_to_string('i18n38_2', {'langcodes': ['it', 'fr']})
+        self.assertEqual(
+            output,
+            'it: Italian/italiano/italsky bidi=False; '
+            'fr: French/français/francouzsky bidi=False; '
+        )
 
     @setup({'template': '{% load i18n %}{% trans %}A}'})
     def test_syntax_error_no_arguments(self):