Vowel Signs for Learning and TTS

Ordinary Persian leaves the short vowels a, e, and o unwritten. Small combining signs can make them explicit for teaching, dictionaries, disambiguation, and text-to-speech, but a fully marked sentence is not normal Persian prose. In this guide, that difference is encoded directly: target shows the natural unpointed text, while spokenForm carries the same letters and boundaries with pronunciation marks added for audio.

The signs do not supply a second spelling. Strip fathe, kasre, damme, sukun, tashdid, and other combining vowel marks from spokenForm, and the remaining characters must reproduce target exactly—including spaces, ZWNJs, punctuation, and Persian digits.

The five signs you need first

Combining signs attach to a base letter rather than occupying a letter position of their own. A dotted circle below only makes an otherwise invisible combining mark visible in isolation.

Fathe, kasre, and damme name written signs; a, e, and o describe their ordinary Iranian Persian sound values. Arabic recitation assigns related marks within a different sound and grammatical system. Persian learners should not import Arabic case endings or assume every Arabic loan keeps its source-language pronunciation.

Why normal Persian omits the short-vowel signs

Persian spelling records consonants, long-vowel letters, morphology, and boundaries, but usually leaves short vowels for the reader to recover from vocabulary and context. کتاب already contains the long â letter ا; only its short e is absent from ordinary spelling. Adding ی to write that e would change the consonant-and-long-vowel skeleton rather than “complete” it.

Long vowels remain real letters in both versions. Compare unpointed کتاب with marked کِتَابْ: the alef is present on both sides. The marks clarify how to pronounce the same spelling; they do not replace ا، و، ی where those letters encode long vowels or consonants.

English writes vowel letters in nearly every syllable, so an English-speaking learner may experience unpointed Persian as incomplete. It is better understood as a different distribution of work: the script supplies a stable lexical skeleton, while the reader supplies predictable short vowels from known words and syntax.

Context can choose between two marked readings

The unpointed spelling مرد has at least two common readings. As a noun, مَرْدْ mard means “man”; as a past verb, مُرْدْ mord means “died.” No amount of staring at the bare three letters selects one reading. The sentence does.

This is the strongest reason to keep a separate audio form. If speech software sees bare مرد, it must guess; a fully controlled spokenForm makes the intended reading explicit without showing learners an artificially pointed everyday sentence.

Tashdid marks a real doubled consonant

Tashdid ◌ّ means that one written consonant has two phonological positions: the first closes a syllable and the second begins the next. In مُعَلِّمْ mo'allem, the doubled ل is not decorative Arabic spelling. It belongs to the established Persian pronunciation of the loanword, though normal Persian target text writes معلم without the mark.

Typing the consonant twice would change the skeleton. For pronunciation control, keep one base letter and add tashdid. For ordinary display, omit the mark unless disambiguation or teaching requires it.

Tanvin has a limited Persian afterlife

Tanvin consists of doubled vowel signs: ◌ً fathatan, ◌ٍ kasratan, and ◌ٌ dammatan. They belong historically to Arabic nominal endings, not to productive Persian noun grammar. Modern Persian retains fathatan in a limited conventional set of Arabic-derived adverbs, such as حتماً hatman “certainly,” اصلاً aslan “at all/originally,” and معمولاً ma'mulan “usually.” Here the ending is lexicalized as -an.

Do not attach tanvin creatively to ordinary Persian nouns, and do not pronounce Arabic nominative, accusative, or genitive case endings in a Persian sentence. Kasratan and dammatan belong to Arabic text and appear in Persian contexts only inside Arabic phrases, quotations, or linguistic discussion (formal/academic)—not as productive Persian endings. The next page on shadda, tanvin, and other Arabic diacritics treats those restricted forms in depth.

Building a safe spokenForm

A useful spokenForm adds enough information to force the intended Iranian reading:

1. Add fathe, kasre, and damme for pronounced short vowels.
2. Use sukun where a consonant closes a syllable and a synthesizer might invent a vowel.
3. Add tashdid only for a genuinely doubled consonant.
4. Preserve every base letter, space, ZWNJ, digit, and punctuation mark.
5. Do not add Arabic case endings to Persian words.

The ZWNJs in بی‌شک and می‌گیرم remain in exactly the same positions. Vowel marks are transparent to joining, while ZWNJ controls the morphological boundary. The audio layer must never silently repair or rewrite the displayed orthography.

Register and controlled pointing

Continuous full pointing is normal in pedagogical material and pronunciation tools (instructional), not in ordinary (written-standard) Persian. Dictionaries may mark a headword or ambiguous syllable. Editors sometimes add one decisive vowel sign to prevent a rare or technical word from being misread (formal/academic). Poetry editions may point a form whose reading matters for meter (literary).

Informal messages are also normally unpointed (informal). Omitting signs is not casual carelessness; it is the standard behavior of the writing system. Conversely, a fully pointed Arabic quotation should be read as Arabic material, not as evidence that Persian itself has revived Arabic case inflection.

Common Mistakes

1. Fully pointing the displayed Persian sentence. Learners need to see the form used in real life; pronunciation belongs in spokenForm.

2. Adding a vowel letter for an omitted short vowel. Short e in ketâb is kasre when marked, not ی in the spelling.

3. Treating tashdid as two typed base letters. The doubled sound uses one consonant plus the combining mark in pointed text.

4. Importing productive Arabic case endings. Persian nouns have no Arabic-style nominative ending.

5. Preserving vowel marks but losing the ZWNJ. Pronunciation annotation cannot replace morphological spelling.

Key Takeaways

Fathe, kasre, and damme show Persian a, e, and o; sukun blocks a following vowel; tashdid doubles a consonant. Tanvin is not productive Persian case marking, though fathatan survives in a small lexicalized class. Keep ordinary target unpointed and put controlled pronunciation in a skeleton-identical spokenForm.