foreign family registration Korea multicultural family benefits Korea divorce visa korea child custody foreign parent korea immigration parenting proof foreign parent school registration Korea child custody foreign parent Korea family support korea multicultural family korea multicultural family residency korea child education support korea multicultural family school Korea F6 divorce visa Korea f6 visa after divorce korea multicultural family visa korea foreign parent residency korea foreign parents korea foreign parent residency korea child visa korea multicultural family visa korea multicultural divorce Korea visa multicultural family school risk Korea foreign parent education issues Korea childcare subsidy multicultural Korea live in korea child born in korea foreign parent visa foreign parents school issues Korea multicultural custody visa Korea multicultural divorce visa korea school records visa Korea foreign parent multicultural family school communication Korea