Translation Fixes (#4433)

* Change 'zh-cn' to 'zh-hans'

* Enforce consistent naming scheme when rendering translated javascript files

* More intelligent lookup of translated javascript files

- Ensure that the language code is lower-case (to match translated files)
- Provide fallback if specified langauge code is not found

* Replace underscore characters

* remove debug hook

InvenTree/InvenTree/management/commands/prerender.py

@@ -12,8 +12,15 @@ from django.utils.translation import override as lang_over
 
 def render_file(file_name, source, target, locales, ctx):
     """Renders a file into all provided locales."""
+
     for locale in locales:
+
+        # Enforce lower-case for locale names
+        locale = locale.lower()
+        locale = locale.replace('_', '-')
+
         target_file = os.path.join(target, locale + '.' + file_name)
+
         with open(target_file, 'w') as localised_file:
             with lang_over(locale):
                 renderd = render_to_string(os.path.join(source, file_name), ctx)

InvenTree/InvenTree/settings.py

@@ -718,7 +718,7 @@ LANGUAGES = [
     ('th', _('Thai')),
     ('tr', _('Turkish')),
     ('vi', _('Vietnamese')),
-    ('zh-cn', _('Chinese')),
+    ('zh-hans', _('Chinese')),
 ]
 
 # Testing interface translations

InvenTree/locale/zh_Hans/LC_MESSAGES/django.po

@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: inventree\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2023-02-28 21:17+0000\n"
+"POT-Creation-Date: 2023-03-01 10:01+0000\n"
 "PO-Revision-Date: 2023-02-28 22:38\n"
 "Last-Translator: \n"
 "Language-Team: Chinese Simplified\n"
@@ -11550,7 +11550,8 @@ msgstr ""
 
 #: templates/socialaccount/signup.html:10
 #, python-format
-msgid "You are about to use your %(provider_name)s account to login to\n"
+msgid ""
+"You are about to use your %(provider_name)s account to login to\n"
 "%(site_name)s.<br>As a final step, please complete the following form:"
 msgstr ""
 
@@ -11737,4 +11738,3 @@ msgstr "编辑项目权限"
 #: users/models.py:231
 msgid "Permission to delete items"
 msgstr "删除项目权限"
-

InvenTree/part/templatetags/inventree_extras.py

@@ -570,7 +570,30 @@ class I18nStaticNode(StaticNode):
             self.original = self.path.var
 
         if hasattr(context, 'request'):
-            self.path.var = self.original.format(lng=context.request.LANGUAGE_CODE)
+
+            # Convert the "requested" language code to a standard format
+            language_code = context.request.LANGUAGE_CODE.lower().strip()
+            language_code = language_code.replace('_', '-')
+
+            # Find the first "best" match:
+            # - First, try the original requested code, e.g. 'pt-br'
+            # - Next, try a simpler version of the code e.g. 'pt'
+            # - Finally, fall back to english
+            options = [
+                language_code,
+                language_code.split('-')[0],
+                'en',
+            ]
+
+            for lng in options:
+                lng_file = os.path.join(
+                    djangosettings.STATIC_ROOT,
+                    self.original.format(lng=lng)
+                )
+
+                if os.path.exists(lng_file):
+                    self.path.var = self.original.format(lng=lng)
+                    break
 
         ret = super().render(context)