Most descriptions of Arabic typesetting stop at the obvious. It reads right to left, letters change shape depending on where they sit in a word, and the page has to be set up the other way round.
All true, and none of it is where Arabic books actually go wrong. A layout can get every one of those things right and still fail on the page, because the problems that cause real trouble are further down: in the vowel marks, in the joins between letters, in the lines where Arabic and English meet.
This is where Arabic typesetting stops being a direction setting and becomes a craft.
Vowelled Text Needs Room the Font Does Not Give You
Most modern Arabic prose is printed without short vowel marks. A fluent reader supplies them. Religious texts, classical works, poetry, and books for children and learners are a different matter. They are commonly printed fully vowelled, with vowel and recitation marks distributed extensively above and below the text.
Those marks take vertical space. A mark sitting above one line can crowd the line above it, and a mark below can collide with the one beneath. A leading value that suits an unvowelled novel will not suit a vowelled primer, even in the same typeface at the same size.
The marks also have to stay with their letters. A diacritic belongs to the character it modifies and must never drift, detach, or land on a line of its own. When a layout engine or a font handles this badly, the result reads as a spelling error to anyone who knows the language, because in vowelled text a misplaced mark can change the pronunciation or the meaning.
This is one of the clearest differences between a book set for a general Arabic reader and one set for scripture, poetry, or teaching. The two need different leading, and often different fonts.
Styling That Breaks the Word Apart
Arabic is cursive. Letters connect to their neighbours, and the connection is part of the letterform rather than decoration added afterwards.
That creates a trap Latin typesetting rarely meets. Changing the font, weight, style, or size of part of a word can interfere with Arabic shaping in some layout environments. The letters on either side of the change stop connecting, and the word falls into pieces that no Arabic reader would write. Even a change that should preserve the join, such as colour on its own, is worth checking, because the result depends on how the application and the font handle shaping across the style boundary.
It is easy to miss in production because the instruction itself may be perfectly reasonable: emphasise this term, change the weight of that word, highlight this phrase. In Arabic, the implementation has to be checked after styling to make sure the shaping has survived intact.
Where Arabic and English Share a Line
Academic, technical, and bilingual books routinely carry English inside Arabic: a Latin technical term, a citation, a product name, a figure reference. The text runs right to left, the embedded phrase runs left to right, and the two have to coexist on the same line.
Software handles this with the Unicode Bidirectional Algorithm, and usually it works. The failures come at the edges. Punctuation attaches to the wrong side of an embedded phrase. Brackets appear to face the wrong way because the reading direction around them has changed. Numbers inside Arabic sit in an order a careless check will not catch.
Line breaks are the subtlest case. When an embedded left-to-right phrase breaks across two lines, it has to break in the order the words are spoken, so that nobody is ever made to read a line from bottom to top. A layout that looks balanced can still break the phrase in its visual order and scramble its meaning.
This is also where Arabic typesetting services earn their fee on academic work. A check that looks only at the Arabic passes the page. A check that looks at the points where the two scripts meet notices the embedded phrase has come apart.
The Ligature a Font Cannot Skip
Nearly every style of Arabic script joins lam and alef into a single, special shape rather than connecting them as two separate letters. Most Arabic fonts treat this as a mandatory ligature, and it applies equally to the variants of alef carrying hamza or madda.
A font or setup that fails to form it produces text that looks wrong instantly to an Arabic reader, in the way that an English word with a letter printed upside down would. It is worth checking on a sample page before a font is committed to a whole book, because it is the kind of fault that may be missed unless someone checks for it specifically.
No Hyphens, So Justification has to Come From Somewhere Else
Arabic does not hyphenate. Words are not broken across lines, so the tools a Latin typesetter reaches for to even out a justified paragraph are simply not available.
Evenly justified Arabic therefore depends on other means: extending letter connections, choosing wider or narrower forms of certain letters, and adjusting spacing between words, often in combination. Done well, it produces the calm, even texture of a well-made Arabic page. Done badly, it produces rivers of space or letters stretched to the point of distortion.
Choosing a Script Style for the Job
Arabic has several major calligraphic styles, and they are not interchangeable in a book.
| Style | Where it usually belongs |
| Naskh | Continuous reading. The standard choice for body text in books, because it stays legible at text sizes over long passages. |
| Kufi | Commonly used for display in contemporary book design: headings, titles, and covers, where its geometric structure has room to work. |
| Nastaliq | Persian and Urdu rather than Arabic, and a different typesetting problem in its own right. |
The common mistake is choosing a body face because it looks handsome in a heading. A style that works beautifully at display sizes can become tiring across three hundred pages of continuous reading.
Practice also varies by region. Conventions in the Western Arab regions of North Africa differ in places from those further east, so a house style that suits one market is worth checking before it is applied to another.
Get Your Arabic Edition Typeset by Alpha eBook
Alpha eBook provides book typesetting services for Arabic titles, from unvowelled modern prose to fully vowelled religious and classical texts, and bilingual editions that carry Arabic and English together.
Fonts are chosen for the reading they have to support, vowelled text is set with the leading it needs, and mixed-script lines are checked where the two scripts meet.
For books that combine Arabic with other languages, our multilingual typesetting work covers editions across several scripts.
Send us a sample of your manuscript and we will set a spread so you can see how the edition reads before committing the full title.
Frequently asked questions
Why do Arabic vowel marks collide even when the font supports Arabic?
Because supporting the marks and leaving enough vertical room for them are different things. A font can position the vowel marks correctly around each letter while the lines themselves are still set too closely together. The fix may therefore be additional leading, and sometimes a different typeface, rather than a character or encoding problem.
Should an Arabic edition use Western or Arabic-Indic numerals?
Both are in use, and which is right depends on the region and the publisher’s house style rather than on the language. It is worth settling before layout begins, because mixed conventions inside one book are noticed at once, and page numbers, figure references, and the index all have to agree.
Can the same font family be used for both Arabic and English?
Some families ship matched Arabic and Latin designs, which keeps a bilingual page looking like one book. Where they do not, the two faces are paired by eye. Matching the apparent size and weight matters more than matching the point size, because Arabic and Latin set at the same nominal size rarely look the same on the page.
Is Arabic typesetting the same as Persian or Urdu?
They share a script but not a practice. Persian and Urdu have their own conventions, and Urdu is commonly set in Nastaliq, which behaves quite differently from Naskh.
