Send Cloudron default language via status call

src/provision.js

@@ -236,6 +236,7 @@ function getStatus(callback) {
                 cloudronName: allSettings[settings.CLOUDRON_NAME_KEY],
                 footer: branding.renderFooter(allSettings[settings.FOOTER_KEY] || constants.FOOTER),
                 adminFqdn: settings.adminDomain() ? settings.adminFqdn() : null,
+                language: allSettings[settings.LANGUAGE_KEY],
                 activated: activated,
                 provider: settings.provider() // used by setup wizard of marketplace images
             }, gProvisionStatus));