What languages do the ethnic groups in South Korea speak?

The vast majority of people in South Korea speak Korean, which is the official language. However, there are several ethnic groups in South Korea that also speak their own languages. Here are some examples:

* Korean: This is the language spoken by the majority of South Koreans, who are ethnically Korean. It is an Altaic language, meaning it is related to languages like Turkish and Mongolian.

* Jeju (also known as Cheju): This is a language spoken on Jeju Island, off the southern coast of South Korea. It is considered a distinct language, not just a dialect of Korean, by many linguists.

* Goryeo-mal: This is a language spoken by the Joseonjok, an ethnic Korean group living in China. It is very similar to Korean, but with some differences in vocabulary and pronunciation.

* Other Languages: There are also small communities of people who speak other languages in South Korea, such as English, Chinese, Japanese, and Vietnamese. This is due to immigration, foreign investment, and cultural exchange.

It's important to note that while there are different languages spoken within South Korea, Korean is the dominant language and is widely understood and spoken by almost everyone in the country.