Which system should I use when writing?

Revised Romanization, unless you are writing academically in a field that still expects McCune-Reischauer. For names, always use the spelling the person uses themselves.

Why does the same letter get written g in one place and k in another?

Because Korean consonants shift with position, and the romanization follows what a listener is likely to hear. It is a feature of the transcription, not an inconsistency in Korean.

Is romanization useful at all for learning?

Briefly, as a check while you are still slow at reading. Learners who lean on it past the first few weeks usually find their reading speed stalls.

Why the Same Korean Word Has Three English Spellings

Busan or Pusan. Lee or Yi. Gimbap or kimbap. Romanization looks chaotic until you know there is more than one system in play — and that names follow their own rules entirely.

6 min read·2026-08-18

You look up a Korean city and find two spellings. You look up a surname and find four. Nothing is broken — you are seeing several systems at once.

Knowing which is which takes five minutes and saves a lot of confusion, especially when you are searching for something and getting no results.

There is an official system, and an older one

South Korea adopted its current official romanization in 2000. It is called Revised Romanization, and it is what you see on road signs, station names, and government material today.

Before that, the widely used system was McCune-Reischauer, which relies on diacritics and apostrophes to mark distinctions. Older books, academic writing, and plenty of material from before the change still use it.

That single switch explains most of the double spellings you run into.

•Busan (current) · Pusan (older)
•Daegu (current) · Taegu (older)
•Jeju (current) · Cheju (older)
•Gimpo (current) · Kimpo (older)

What Revised Romanization does

The current system was built to be typeable on an ordinary keyboard, which is why the diacritics went away and some spellings look odd at first.

ㅓ became eo and ㅡ became eu. Neither is a pronunciation guide — they are just two-letter labels that were not already taken.

That is worth internalising early, because trying to read eo as an English vowel sequence will actively mislead you.

Hear what the letters actually sound like

Names are a separate matter

Personal names do not follow the official system, and nobody expects them to. People spell their own names as they like, often following family tradition or whatever was on the first passport.

The surname written 이 appears as Lee, Yi, Rhee and others. 박 shows up as Park, Bak or Pak. All of them are the same Korean name.

So if you are searching for a person and finding nothing, try the other spellings before concluding they do not exist.

Some words never converted

A handful of words entered English before any of this and simply stayed as they were.

Kimchi is the obvious one. Under the current system the spelling would look different, but the word had been in English dictionaries for decades and there was no appetite to change it.

Taekwondo, soju and a few others are in the same position. Established spellings tend to win.

The practical advice

The real fix is not to learn the romanization systems in detail. It is to stop needing them.

Once you can read Hangul directly, the whole problem dissolves — 부산 is 부산 regardless of how anyone chose to spell it in Latin letters this decade.

Until then, treat romanization as a rough search key rather than a guide to how something sounds, and try a second spelling whenever the first one comes up empty.

Practise reading Hangul directly

Frequently Asked Questions

Which system should I use when writing?: Revised Romanization, unless you are writing academically in a field that still expects McCune-Reischauer. For names, always use the spelling the person uses themselves.
Why does the same letter get written g in one place and k in another?: Because Korean consonants shift with position, and the romanization follows what a listener is likely to hear. It is a feature of the transcription, not an inconsistency in Korean.
Is romanization useful at all for learning?: Briefly, as a check while you are still slow at reading. Learners who lean on it past the first few weeks usually find their reading speed stalls.