[Bug]: romanization issues with epenthetic "n"

[thomasst]

Bug description

It appears that some words are not romanized correctly and an epenthetic "n" is inserted incorrectly. For example, the word "호랑이" should be romanized as "horangi", not "horangni". This also matches the romanization obtained at http://roman.cs.pusan.ac.kr/input_eng.aspx

Expected behavior

Current:

console.log(romanize('호랑이')); // "horangni"
console.log(romanize('빨간색이에요')); // "ppalgansaengnieyo"

Expected:

console.log(romanize('호랑이')); // "horangi"
console.log(romanize('빨간색이에요')); // "ppalgansaegieyo"

To Reproduce

No response

Possible Solution

No response

etc.

No response

[wet6123]

This issue seems to come from 'standardizePronunciation'.
And I found some extra cases.

// 단일 형태소는 ㄴ첨가가 일어나지 않음
expect(standardizePronunciation('호랑이')).toBe('호랑이'); //but 호랑니
expect(standardizePronunciation('공이')).toBe('공이'); // but 공니
// ㄴㄴ 첨가
expect(standardizePronunciation('나뭇잎')).toBe('나문닙'); // but 나무십
// 수의적 표현
expect(standardizePronunciation('첫인상')).toBe('처딘상'); // but 처신쌍