Index: branches/5.1.x/core/install/install_data.sql
===================================================================
diff -u -N -r13476 -r13489
--- branches/5.1.x/core/install/install_data.sql	(.../install_data.sql)	(revision 13476)
+++ branches/5.1.x/core/install/install_data.sql	(.../install_data.sql)	(revision 13489)
@@ -34,6 +34,7 @@
 INSERT INTO ConfigurationValues VALUES(DEFAULT, 'UseModRewrite', '0', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_use_modrewrite', 'checkbox', '', '', 10.02, 0, 1, NULL);
 INSERT INTO ConfigurationValues VALUES(DEFAULT, 'ModRewriteUrlEnding', '.html', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_ModRewriteUrlEnding', 'select', '', '=+||/=+/||.html=+.html', 10.021, 0, 0, NULL);
 INSERT INTO ConfigurationValues VALUES(DEFAULT, 'ForceModRewriteUrlEnding', '0', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_ForceModRewriteUrlEnding', 'checkbox', '', NULL, 10.022, 0, 0, 'la_hint_ForceModRewriteUrlEnding');
+INSERT INTO ConfigurationValues VALUES(DEFAULT, 'UseContentLanguageNegotiation', '0', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_UseContentLanguageNegotiation', 'checkbox', '', '', 10.023, 0, 0, NULL);
 INSERT INTO ConfigurationValues VALUES(DEFAULT, 'cms_DefaultDesign', '#default_design#', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_DefaultDesignTemplate', 'text', NULL, NULL, 10.03, 0, 0, NULL);
 INSERT INTO ConfigurationValues VALUES(DEFAULT, 'ErrorTemplate', 'error_notfound', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_error_template', 'text', '', '', 10.04, 0, 0, NULL);
 INSERT INTO ConfigurationValues VALUES(DEFAULT, 'NoPermissionTemplate', 'no_permission', 'In-Portal', 'in-portal:configure_advanced', 'la_section_SettingsWebsite', 'la_config_nopermission_template', 'text', '', '', 10.05, 0, 0, NULL);