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