Various European countries are members of an International Commission on Civil Status which provides a mutually recognized convention on the coding of entries appearing in civil status documents, with common codes and translation tables between the language of the member states. They also provide an English unofficial translation.
Also in some countries the "civil status" or marital status is considered to be the proper way to ask a person if they are single or married (divorced, widowed). It reveils the way society looks upon them and offers the other people the information that the person is/or not free of responsibility towards one or several individuals.