Handle exception.

src/modules/dummypythonqt/main.py

@@ -90,15 +90,19 @@ class DummyPythonQtViewStep:
     def widget(self):
         return self.main_widget
 
-    def retranslate(self, localeName):
+    def retranslate(self, locale_name):
         calamares.utils.debug("DummyPythonQt retranslation event "
-                              "for locale name: {}".format(localeName))
+                              "for locale name: {}".format(locale_name))
 
+        try:
             global _
             _t = gettext.translation('dummypythonqt',
                                      os.path.join(_path, 'lang'),
-                                 languages=[localeName])
+                                     languages=[locale_name])
             _ = _t.lgettext
+        except OSError as e:
+            calamares.utils.debug(e)
+            pass
 
 
 class DummyPQJob: