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What Is the Korean Language?

Korean is the language spoken by roughly 80 million people on the Korean peninsula and in diaspora communities worldwide. It is the official language of both South Korea and North Korea, and it has one of the most remarkable writing systems ever invented — an alphabet specifically designed to be easy to learn, created by a king who believed literacy should not be reserved for the elite.

A Language Without Relatives

Korean is a language isolate, meaning linguists have not been able to conclusively link it to any other living language family. This is unusual — most languages have identifiable relatives. English is related to German. Spanish is related to Italian. Japanese has the Ryukyuan languages. Korean stands alone.

There have been attempts to connect Korean to the Altaic language family (which would group it with Turkish, Mongolian, and possibly Japanese), but the Altaic hypothesis has fallen out of favor among most linguists. The similarities between Korean and Japanese — and there are many — may result from centuries of geographic proximity and cultural exchange rather than a common ancestor.

What is clear is that Korean vocabulary has been heavily influenced by Chinese. Roughly 60% of Korean words are Sino-Korean — borrowed from Chinese, much as English has absorbed enormous numbers of Latin and French words. But the grammar, the sound system, and the basic structure of Korean are fundamentally different from Chinese.

Hangul: The Alphabet

Hangul is the reason linguists get excited about Korean. Created in 1443 under the direction of King Sejong the Great, it is widely considered one of the most scientifically designed writing systems in human history.

Before Hangul, Koreans who could write used Chinese characters — a system requiring years of study to master thousands of symbols. The vast majority of Koreans were illiterate. Sejong’s stated goal was to create a writing system simple enough that “a wise man can acquaint himself with them before the morning is over; a stupid man can learn them in the space of ten days.”

The design is ingenious. Consonant letters are based on the shape of the mouth and tongue when pronouncing the sound. The letter for “g” (ㄱ) represents the back of the tongue touching the soft palate. The letter for “n” (ㄴ) shows the tongue touching the ridge behind the teeth. Related sounds use related shapes — “k” (ㅋ) adds a stroke to “g” (ㄱ) to show aspiration.

Vowels are built from three basic elements: a horizontal line (earth), a vertical line (human), and a dot (heaven, now written as a short stroke). These combine systematically to create all vowel sounds.

Letters are not written in a line like English. Instead, they are grouped into syllable blocks. The syllable “han” (한) stacks ㅎ (h), ㅏ (a), and ㄴ (n) into a square block. This makes Korean text visually compact and immediately parseable by syllable.

Hangul has 14 basic consonants and 10 basic vowels, plus compound consonants and diphthongs. A motivated learner can memorize the entire system in two to four hours. Reading Korean words phonetically — even without understanding their meaning — becomes possible within a day.

How Korean Grammar Works

Korean grammar will seem alien if you speak English. The verb goes at the end of the sentence. “I ate rice at home” becomes, structurally, “I home-at rice ate.” Subject and object are marked with particles (small suffixes) rather than word order, which means Korean word order is relatively flexible — as long as the verb stays last.

Agglutination is the key concept. Korean verbs are built by stacking suffixes onto a stem. A single verb form might encode tense, politeness level, aspect, mood, and the speaker’s relationship to the listener. The verb “to go” (가다, gada) can become 가셨었겠습니다 — a single word meaning approximately “it seems probable that [someone respected] had gone.”

Honorifics are not optional politeness — they are baked into the grammar. Korean has multiple speech levels that change verb endings, vocabulary choices, and even some nouns depending on the relative social status of the speaker and listener. Speaking to a friend, a boss, a stranger, or an elderly person requires different grammatical forms. Using the wrong level is a real social error.

North-South Differences

Seventy years of separation have created noticeable differences between the Korean spoken in South Korea and North Korea. South Korean has absorbed thousands of English loanwords (컴퓨터 keompyuteo for “computer,” 아이스크림 aiseukeurim for “ice cream”). North Korean has purged most foreign loanwords and coined native Korean alternatives.

Pronunciation has diverged slightly. Some vocabulary differs — the same concept may use different words in each country. North Korean retains some archaic forms that have changed in the South. When North Korean defectors arrive in South Korea, language adjustment is one of the challenges they face — the languages are mutually intelligible but noticeably different.

Learning Korean Today

The global popularity of K-pop, Korean dramas, and Korean cinema has driven an explosion in Korean language learning. The number of people studying Korean worldwide has grown dramatically — the Korean government’s official proficiency test (TOPIK) saw test-takers increase from about 20,000 in 2005 to over 375,000 by 2022.

For English speakers, Korean is genuinely difficult. The grammar is so structurally different that habits from English actively interfere. The honorific system requires social awareness that goes beyond language study. And while Hangul is easy, learning to hear and produce Korean sounds accurately takes practice — distinctions between aspirated and unaspirated consonants, or between different “o” and “u” vowels, are not intuitive for English ears.

The bright side: Hangul makes Korean far more accessible than Chinese or Japanese for reading. You can sound out any Korean word within hours of starting. And the grammar, while different, is highly regular — Korean has very few irregular verbs compared to European languages.

Cultural Weight

Korean is more than communication — it is identity. For Koreans, the language (and especially Hangul) represents cultural independence. During Japanese colonial rule (1910-1945), the Japanese government banned Korean in schools and tried to replace it with Japanese. The survival and revival of Korean became an act of resistance. October 9th — Hangul Day — is a national holiday in South Korea, celebrating the creation of the alphabet. Few countries have a holiday for their writing system. Korea does, and it says something important about what language means to Korean identity.

Frequently Asked Questions

Is Korean hard to learn for English speakers?

The U.S. Foreign Service Institute classifies Korean as a Category IV language — the hardest category for English speakers, requiring approximately 2,200 class hours. The grammar is radically different (subject-object-verb order, agglutinative verb endings, honorific levels). However, the alphabet (Hangul) can be learned in a few hours, which makes reading and pronunciation much more accessible than Chinese or Japanese.

What is Hangul?

Hangul is the Korean alphabet, created in 1443 under King Sejong the Great. It has 14 basic consonants and 10 basic vowels. Letters are grouped into syllable blocks rather than written linearly. Linguists praise Hangul as one of the most logical and scientifically designed writing systems ever created — consonant shapes actually represent the position of the tongue and mouth during pronunciation.

Is Korean related to Japanese or Chinese?

Korean is classified as a language isolate — it has no proven genetic relationship to any other language. Korean grammar resembles Japanese (both are agglutinative with subject-object-verb order), but this may be due to contact rather than shared ancestry. Korean vocabulary includes many Chinese loanwords (about 60% of the vocabulary), similar to how English has many Latin and French borrowings.

Further Reading

• Korean Language – Encyclopaedia Britannica
• Hangul – National Institute of Korean Language
• Korean Studies – UCLA