Use localized website links in the update notification

src/calibre/gui2/update.py

@@ -12,6 +12,7 @@ from calibre.constants import (__appname__, __version__, iswindows, isosx,
         isportable, is64bit, numeric_version)
 from calibre import prints, as_unicode
 from calibre.utils.config import prefs
+from calibre.utils.localization import localize_website_link
 from calibre.utils.https import get_https_resource_securely
 from calibre.gui2 import config, dynamic, open_url
 from calibre.gui2.dialogs.plugin_updater import get_plugin_updates_available
@@ -26,7 +27,7 @@ def get_download_url():
             else 'osx' if isosx else 'linux')
     if which == 'windows' and is64bit:
         which += '64'
-    return 'https://calibre-ebook.com/download_' + which
+    return localize_website_link('https://calibre-ebook.com/download_' + which)
 
 
 def get_newest_version():
@@ -114,11 +115,11 @@ class UpdateNotification(QDialog):
         ver = calibre_version
         if ver.endswith('.0'):
             ver = ver[:-2]
-        self.label = QLabel(('<p>'+
-            _('New version <b>%(ver)s</b> of %(app)s is available for download. '
-            'See the <a href="https://calibre-ebook.com/whats-new'
-            '">new features</a>.'))%dict(
-                app=__appname__, ver=ver))
+        self.label = QLabel(('<p>'+ _(
+            'New version <b>{ver}</b> of {app} is available for download. '
+            'See the <a href="{url}">new features</a>.').format(
+                url=localize_website_link('https://calibre-ebook.com/whats-new'),
+                app=__appname__, ver=ver)))
         self.label.setOpenExternalLinks(True)
         self.label.setWordWrap(True)
         self.setWindowTitle(_('Update available!'))

src/calibre/utils/localization.py

@@ -485,3 +485,27 @@ def localize_user_manual_link(url):
     parts = list(parts)
     parts[2] = path
     return urlunparse(parts)
+
+
+def website_languages():
+    stats = getattr(website_languages, 'stats', None)
+    if stats is None:
+        try:
+            stats = frozenset(P('localization/website-languages.txt', allow_user_override=False, data=True).split())
+        except EnvironmentError:
+            stats = frozenset()
+        website_languages.stats = stats
+    return stats
+
+
+def localize_website_link(url):
+    lc = lang_as_iso639_1(get_lang())
+    langs = website_languages()
+    if lc == 'en' or lc not in langs:
+        return url
+    from urlparse import urlparse, urlunparse
+    parts = urlparse(url)
+    path = '/{}{}'.format(lc, parts.path)
+    parts = list(parts)
+    parts[2] = path
+    return urlunparse(parts)