English pronunciation for Persian speakers: 12 common mistakes and how to fix them
Persian (Farsi) and English use different sets of sounds, so Persian speakers tend to make the same predictable substitutions. That's good news: once you know the 12 patterns below, you know exactly what to practise.
Why these mistakes happen
Persian has about 23 consonants and 6 vowels; standard English has about 24 consonants and well over a dozen vowel sounds. When a sound doesn't exist in your first language, your brain swaps in the closest one it knows. Persian also never starts a word with two consonants and tends to stress the last syllable — both of which shape how English comes out.
Consonants
1. th (θ) becomes s or t
think → sink / tink, three → tree. Put the tip of your tongue lightly between your teeth and blow. If you can't see your tongue in a mirror, it's not θ. Full th guide →
2. th (ð) becomes d or z
this → dis / zis, mother → mader. Same position as θ, but switch your voice on — feel the buzz in your throat.
3. w becomes v
west → vest, wine → vine, we → vee. Persian «و» touches the lower lip with the teeth; English w uses only rounded lips. Start from "oo" and open. Full w/v guide →
4. An extra "e" before s + consonant
student → estudent, school → eschool, speak → espeak. Because no Persian word begins with two consonants, a vowel sneaks in. Hold a long "sss", then add the next sound: sss-tudent.
5. Extra vowels inside clusters
film → filim, desk → deske, asked → aske-d. Keep consonants touching with no vowel between them. Say them slowly together, then speed up.
6. A g after ng
sing → sing-g, long → long-g. The /ŋ/ sound ends in the nose: back of the tongue up, no release into g. (Exceptions: finger, longer, English do have a g.)
Vowels
7. ship and sheep sound the same
English separates short /ɪ/ (ship, live, sit) and long /iː/ (sheep, leave, seat). For /ɪ/ relax your lips and make it short; for /iː/ smile and hold it.
8. full and fool sound the same
Short relaxed /ʊ/ (full, pull, book, good) versus long rounded /uː/ (fool, pool, food, moon).
9. cat, cut and cart blur together
/æ/ in cat is wide and open — between Persian «اَ» and «آ». /ʌ/ in cut is short and central. Practise bag/bug, hat/hut, match/much.
10. late becomes let, and r gets rolled
/eɪ/ is a glide: say "e" and move to "i" — late, paper, rain. And the English r is never tapped or trilled: curl the tongue back without touching anything, especially in word, world, girl, first.
Endings and spelling
11. -ed is pronounced as written
The -ed ending has three sounds, and none is usually "ed": t after voiceless sounds (walked, stopped, laughed), d after voiced sounds (played, cleaned, lived), and ɪd only after t or d (wanted, needed).
12. Silent letters are pronounced
Persian is written mostly as it sounds, English isn't: knife, know, comb, climb, island, listen, Wednesday, honest all hide a silent letter.
Bonus: word stress moves to the end
Persian nouns and adjectives usually stress the last syllable, so English words often come out with stress at the end: compuTER instead of comPUter, probLEM instead of PROBlem, chocoLATE instead of CHOColate. Learn the stress with every new word, and mark it when you write vocabulary.

Echo's 15 sound lessons are built around exactly these patterns — with Persian explanations, the typical mistake for each sound and per-sound scoring that turns the wrong letters red.
Download on theApp StoreFAQ
Which mistake should I fix first?
Start with th and w/v: they appear in the most common English words (the, this, with, we, was), so fixing them makes the biggest difference to how clear you sound.
Will I lose my accent completely?
You don't need to. The goal is to be understood easily, not to sound like a native speaker. Fixing these 12 patterns removes most misunderstandings while you keep your own voice.
Is there an app that explains this in Persian?
Echo (سایه) has a full Persian interface, Persian translations for its practice sentences, and tips for each sound written for Persian speakers.