Hangul uses a silent letter ieung (ㅇ) to represent a null initial consonant. A null final consonant[a] is unwritten, like in sitelen Lasina.
The letters used for p and t differ between specific sitelen Anku proposals. Some use the letters bieup (ㅂ) and digeut (ㄷ), which represent unaspirated/p t/ and are visually simplest, but which are romanized as ⟨b d⟩ to contrast them.[b] Others use pieup (ㅍ) and tieut (ㅌ), which represent aspirated/pʰ tʰ/, a distinction not made in Toki Pona, but which are romanized as ⟨p t⟩.
The semivowelsj and w only occur within diphthongs in Korean, and so are written as part of the vowel letter.
Transcription of the vowel e varies between proposals. Some use the letter e (ㅔ) for its pronunciation, /e/. Others use eo (ㅓ) for symmetry with the other vowel letters needed for Toki Pona, even though it is pronounced as a back vowel /ʌ/.