Farsi vs Persian vs Dari vs Tajik: What’s the Difference?

Persian and Farsi are two names for the same language: “Persian” is the English name, and “Farsi” is what speakers in Iran call it. Dari and Tajik are the forms of Persian spoken in Afghanistan and Tajikistan. All three share most of their grammar and vocabulary. The biggest differences are accent, some everyday words, and Tajik’s Cyrillic alphabet.

Persian vs Farsi: one language, two names

Speakers in Iran call their language فارسی (fârsi). The word comes from Fârs (Pars), the region in southwestern Iran that gave the Persians their name, as Britannica explains. In English, the traditional name is Persian, the same way English speakers say German and not Deutsch.

“Farsi” became common in English in recent decades, mostly for the standard language of Iran. Some scholars and institutions push back on this. Iran’s Academy of Persian Language and Literature has recommended “Persian” as the right name in English, and Ehsan Yarshater, the founding editor of Encyclopaedia Iranica, argued the same. Their point: “Persian” connects the modern language to a thousand years of literature, from Ferdowsi to Hafez, while “Farsi” sounds to many English speakers like a separate, new language.

In practice, both words are fine. If you search for “learn Farsi” or “learn Persian,” you will find the same language. On this site we use both.

Where each variety is spoken and its official status

Iranian Persian (Farsi)

Persian is the official language of Iran. The standard is based on educated Tehran speech, and it is the variety used in Iranian schools, TV, newspapers and most Persian-learning materials, including ours.

Dari (Afghan Persian)

In Afghanistan, Persian is officially called Dari. Afghanistan’s 1964 constitution named “Pushtu and Dari” as the official languages, and Article 16 of the 2004 constitution again lists Pashto and Dari as the official languages of the state. Dari is the main common language in Kabul and across much of the north and west. The best-known spoken standard is Kabul Persian (Kâboli).

Tajik (Tajiki Persian)

Tajik is the official language of Tajikistan, with Russian used as a language of interethnic communication. Tajik-speaking communities also live in Uzbekistan (around Samarkand and Bukhara), elsewhere in Central Asia, and in Russia. In the Soviet period, Tajik was treated as a separate language from Persian, and that is why it has its own name and its own alphabet today.

How many people speak Farsi, Dari and Tajik?

Speaker counts vary a lot depending on the source and on whether second-language speakers are counted. These are reasonable, sourced estimates, not exact figures:

The takeaway: Iranian Persian is by far the largest variety, which is one reason most courses and books teach it.

Scripts: Perso-Arabic vs Cyrillic

Iranian Persian and Dari are both written in the Perso-Arabic script, right to left, with the same 32 letters. A newspaper from Tehran and one from Kabul look almost the same on the page.

Tajik is the exception. Under Soviet rule, Tajik moved from the Perso-Arabic script to a Latin alphabet in the late 1920s, then to Cyrillic around 1939 to 1940. Encyclopaedia Iranica notes that the Cyrillic spelling is based on Russian usage. Tajik Cyrillic adds a few special letters for Persian sounds:

So the Tajik word китоб (kitob) is the same word as Persian کتاب (ketâb, “book”). Cyrillic remains the everyday script in Tajikistan.

Pronunciation differences between Farsi, Dari and Tajik

Most differences come from the vowels. Classical Persian had two extra long vowels, often called “unknown” (مجهول, majhul) vowels: a long ē and a long ō. Iranian Persian merged them with ī and ū. Dari and Tajik kept them apart. This gives some neat pairs:

A few other patterns are worth knowing:

• v vs w. Kabul Persian says the letter و as w, where Tehran says v: میوه is mêwa (“fruit”) in Kabul and mive in Tehran.
• gh vs q. Tehran Persian pronounces غ and ق the same (gh). Dari and Tajik keep them apart, with ق as a q sound.
• Short vowels. Where Tehran has short e and o, Dari often has i and u (ketâb vs kitâb). Tajik has six vowels and has mostly lost the difference between long and short vowels.
• Final -e. Iranian Persian turned many word-final a sounds into e. Tajik keeps the a: Tajik шуда (shuda) vs Iranian شده (shode, “become”).

Vocabulary differences: a comparison with real examples

Formal written Persian is very similar across Iran and Afghanistan. Everyday vocabulary is where you notice the variety. All words below come from Encyclopaedia Iranica’s articles on Kabul Persian and Tajik Persian, plus a published Dari-Farsi comparison listed in the sources.

Iranian Persian vs Dari (Kabul)

Iranian Persian vs Tajik

Notice that many “Tajik” words are not foreign at all. دریا (daryâ) means “sea” in Iran, and پیش and پس are ordinary Persian words. Tajik simply prefers older Persian words where Iranian Persian prefers Arabic loans like قبل and بعد. Tajik also took many technical and political words from Russian between about 1925 and 1955. Since independence, Tajikistan has replaced many of these with Persian words, some coined at home and some borrowed from Iran.

Grammar: mostly the same

The core grammar is shared: the same verb system with past and present stems, the same ezâfe construction (کتابِ من, ketâb-e man, “my book”), no grammatical gender, and subject-object-verb word order. Differences show up mainly in the spoken language. For example, Encyclopaedia Iranica notes that Kabul Persian has no special progressive tense like Tehran’s دارم می‌رم (dâram miram, “I’m going,” spoken Tehran form), and that Kabul speakers say kadum for “I did” where Tehran says کردم (kardam).

Spoken shortcuts also differ. “I say” is می‌گویم (miguyam) in writing, می‌گم (migam) in spoken Tehran Persian, and mêgam in Kabul.

Can Farsi, Dari and Tajik speakers understand each other?

Yes, to a large degree. Britannica describes Farsi and Dari as mutually intelligible dialects and says Tajik is readily intelligible to speakers of Persian. In practice:

• Farsi and Dari: Written texts are almost identical, so reading is easy both ways. Speech takes some getting used to because of the vowels, the w sound and local words.
• Farsi and Tajik: Speakers can usually follow each other in conversation, especially on everyday topics, after a short period of adjustment. Reading is the real wall: most Iranians cannot read Cyrillic, and most Tajiks never learned the Perso-Arabic script well.
• Dari and Tajik: These two are closest in sound, since both keep the old ē and ō vowels and many shared words. Southern Tajik dialects are especially close to the Persian of northern Afghanistan.

A rough comparison: Tehran and Kabul Persian differ a bit like American and British English, in accent and everyday words more than in grammar, with Tajik adding a different alphabet on top. Have you ever heard a Kabuli or Tajik speaker and understood more than you expected? Tell us in the comments.

Which variety of Persian should you learn?

Choose based on the people you want to talk to and the materials you can get:

• Iranian Persian (Farsi) is the best default. It has the most speakers, by far the most textbooks, apps, films, podcasts and music, and it is the standard taught in most universities. If you learn it well, Dari speakers will understand you, and you can adjust to Kabul Persian later.
• Dari makes sense if your family is Afghan, you work with Afghan communities (refugee services, interpreting, NGOs), or you plan to live in Afghanistan. Learn to read Persian script first, since it is the same script, then focus on Kabul pronunciation and vocabulary.
• Tajik is the right choice if you will live or work in Tajikistan or with Tajik speakers in Central Asia or Russia. The Cyrillic script is quick to learn if you already know Russian.

The good news: these are not three separate projects. Grammar, most vocabulary and the literary tradition are shared, so skills move with you. Hafez and Rumi belong to all three.

Frequently asked questions

Is Dari a separate language from Persian?

No. Dari is the official name for the Persian spoken in Afghanistan. Linguists treat Iranian Persian, Dari and Tajik as varieties of one language with different national standards.

Is Tajik just Persian in Cyrillic?

Mostly, but not only. Beyond the alphabet, Tajik keeps older vowels and words, has more Russian loanwords, and has its own coinages. Still, a Tajik and an Iranian can usually hold a conversation.

Should I say “Farsi” or “Persian” in English?

“Persian” is the traditional and more widely used English name, and many scholars prefer it. “Farsi” is also widely understood. Neither is wrong.

Which variety are you learning, and why? Share your reason in the comments. It helps other learners decide.

Sources: Britannica, “Persian language”, Britannica, “Tajik language”, Encyclopaedia Iranica, “Tajik ii. Tajiki Persian” (J. R. Perry), Encyclopaedia Iranica, “Kāboli” (R. Farhadi and J. R. Perry), Constitution of Afghanistan 2004, Article 16, Constitution of Afghanistan 1964, Article 3, CLEAR Global, Farsi and Dari factsheet, CLEAR Global, Language data for Afghanistan, Wikipedia, “Iranian Persian”, Wikipedia, “Persian language”, Wikipedia, “Dari”, Wikipedia, “Tajik alphabet”, Discover Discomfort, “Afghan vs Iranian Persian”

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