i18n, path alias doesn't work
In the Workflow settings of the type page you should choose Multilingual support: enabled or eabled with translation if you want to have the page in 4 different versions on their own.

If you simply choose enabled you can e.g. make as many path aliases as languages are active for one and the same page. If you choose "with translation" you can make translation nodes after creating the page. There is also a rules integration, that makes you all translation nodes automatically.

If you enable Multilingual support you will see in pathauto autmoatic section, that you can choose a path for every enabled language. The prefix you shouldn't use, because itis handled by drupal and/or modules itself. You can change the behaviour in the languages menu under site configuration.