It is getting ambiguous to say that Korea is a racially homogeneous nation as family members have been diversified. Currently, people can easily find foreign-born women and their children.
According to the Korea National Statistical Office, the population of foreign spouses, which immigrated to Korea for getting married to Koreans, exceeded 130,000 as of the spring of 2010. It is five times more than that of 10 years ago.
Multi-cultural families that consist of migrant women, Korean men, and their children are the most general cases. The long time skewed sex ratio toward males, the fact that Korean females are unwilling to live in rural areas, and the sudden increase of matchmaking companies for profit are the main reasons for the increase of international marriage.
As international marriage increases, many problems related to multicultural families have  occurred. Most of them suffer from economic hardships. The Ministry for Health, Welfare and Family Affairs surveyed the multicultural family's monthly incomes. In the survey, 38.4% responded 'between 1,000,000 and 2,000,000 won' and 21.3% responded 'below 1,000,000'. It means that 60% of them make less than 2,000,000 won a month, and programs to support them are still deficient.
The language barrier is also a major problem they confront. There are many multi-cultural families in rural areas, and the migrant women have difficulty adapting  themselves to Korea owing to the difference in languages, cultures and customs. Eight out of ten immigrant women said that the language barrier was the most difficult matter when they got married.
They have troubles with their children's education too. The children often experience a lack of parenting and education because the immigrant women often bring up the children by themselves with husbands who are busy making a living. In addition, the government is not capable of supporting all of them yet. In the case of the Gyeonggi-do in which most multi-cultural students live, more than half of the students couln't receive even an elementary education because of money problem.
These problems resulted from poverty and lack of integration. Because it is obvious that their population will increase now and forever, governmental supports and improved awareness will continuously be required.