Can You Hear the Difference?

ɪ vs iː

Korean, Japanese, and Spanish don't distinguish vowel length the way English does — a five-vowel system doesn't have a slot for "short i" next to "long e," so the ear has to build a new category from scratch, not just learn a new word.

l vs r

Especially for Japanese & Korean speakers

Japanese has a single liquid consonant that covers the territory of both English /l/ and /r/, and Korean's ㄹ shifts between the two depending on position — so the confusion isn't carelessness, it's two categories collapsing into one in the L1.

b vs v

Especially for Spanish & Korean speakers

Spanish famously treats b and v as the same sound (betacism), and Korean has no /v/ phoneme at all — both make this pair genuinely inaudible at first, not just easy to typo.

θ vs s

The voiceless dental fricative /θ/ is rare cross-linguistically — Korean, Japanese, French, and German all lack it, so learners from those backgrounds default to the nearest sound they do have: /s/.

ɜːr vs ɔː

Neither Korean nor Japanese has a vowel that behaves like English /ɜːr/ (the sound in "bird," "work," "her"), so it commonly gets flattened toward the nearest existing vowel — often landing close to /ɔː/, which is exactly what "walk" uses.

f vs p

Especially for Japanese & Korean speakers

Neither Korean nor Japanese historically had an /f/ phoneme — Japanese approximates it with [ɸ] and loanwords into Korean regularly substitute /p/, so hearing /f/ as /p/ isn't a slip, it's the nearest native category taking over.

w vs v

Especially for Korean speakers

Korean has no native /v/, and the closest available sounds sit right next to /w/ in the mouth — a classic case documented in Korean-English pronunciation research where learners' production and perception of the pair both drift toward one merged sound.

θ vs d

Without a native /θ/, learners often substitute the nearest stop consonant their L1 does have — for many Korean, Japanese, and Spanish speakers that lands closer to /d/ or /t/, collapsing exactly this pair.

æ vs ʌ

Neither /æ/ nor /ʌ/ has a clean equivalent in Korean or Japanese's smaller vowel inventories, so both regularly fold toward the same mid-open vowel until a learner's ear is trained to split them apart.

ʊ vs uː

Like ship/sheep, this is a vowel-length contrast — a distinction Korean, Japanese, and Spanish don't mark the way English does, so the two vowels sound like one to an untrained ear.

b vs p

Especially for Spanish & Korean speakers

Spanish and Korean both neutralize the voiced/voiceless distinction in certain positions, and word-initial stops in Korean carry aspiration cues English doesn't use the same way — both push this exact pair together for a lot of learners.

k vs g

Voicing contrasts like k/g are frequently neutralized or weakened in Spanish and Korean phonology depending on position in a word — a documented source of exactly this kind of minimal-pair confusion for learners from both backgrounds.

æ vs ɒ

Korean and Japanese's smaller vowel inventories don't reserve separate slots for English's /æ/ and /ɒ/, so both commonly collapse toward the same rounder, more central vowel until the ear is trained to hear them as two different sounds.

s vs ʃ

Especially for Spanish speakers

Spanish has no native /ʃ/ sound at all — loanwords approximate it with ch or s — and Korean's closest sound only surfaces before certain vowels, not before the open back vowel in "shock," so outside that context it collapses to a plain s.

v vs f

Especially for Korean speakers

Unlike berry/very, where two different mouth shapes are in play, van and fan use the exact same mouth position — lips and teeth in the same spot for both. The only signal separating them is voicing, whether the vocal cords buzz or stay silent, and Korean's sound inventory skips /v/ entirely, removing the one cue this particular pair depends on.

z vs s

Korean's sound inventory has no standalone /z/ — only /s/ — and Spanish's z-like sound only ever appears automatically next to certain consonants, never as its own category, so both push "zoo" toward sounding like "Sue" by default.

θ vs t

Especially for French & German speakers

French and German both lack the voiceless "th" sound entirely, and speakers of both languages typically substitute the nearest stop consonant they do have — /t/ — which is exactly the sound that separates thin from tin.

d vs t

Especially for German & Korean speakers

German and Korean both apply systematic final-consonant devoicing — a voiced sound like d automatically turns voiceless at the end of a word — so bad and bat can be genuinely identical by ear for speakers of either language, not just hard to say.

n vs ŋ

Especially for Japanese speakers

Japanese has a single nasal sound at the end of a syllable that shifts automatically between an n-like and an ng-like pronunciation depending on what follows — so Japanese speakers never had to learn n and ng as two separate categories the way English requires.

f vs h

Especially for Japanese speakers

Japanese's h sound shifts to a breathy, almost f-like sound before certain vowels, which means Japanese speakers often carry a single mental category that covers territory English splits firmly into two separate consonants, f and h.