I have some troubles in populate a #propertymanager variable with part of url path.
Example: i have the url "http://www.example.com/path/lang_EN" and i want to populate URL_LANGUAGE variable with "EN".
I have tried with this rule (URL_PATH is populated from AK_PATH); i supposed that "TEST" string should replace "http://www.example.com/path/lang_" first group match of "([\s\S]*?)(EN|IT|FR|ES|DE|KO|ZH|RU)" regex , giving "TESTEN" value, but returns an empty string.
I can't use the path offset extraction option because the offset can vary.