UI/UX & Accessibility • 9 min read

Mastering RTL (Right-to-Left) Localization: Arabic, Hebrew, and Persian Layouts

A comprehensive developer guide for handling Right-to-Left (RTL) stylesheets, CSS logical properties, and bidirectional text mirroring.

Mastering RTL (Right-to-Left) Localization: Arabic, Hebrew, and Persian Layouts

Localizing a website into Arabic, Hebrew, Persian, or Urdu involves more than translating words—it requires flipping your entire user interface from Left-to-Right (LTR) to Right-to-Left (RTL).

Navigation bars, sidebar menus, form inputs, chevron icons, and button alignments must mirror horizontally to create a natural reading flow for native users.

1. Using CSS logical properties

Modern CSS logical properties replace directional coordinates with flow-relative directions, making RTL adaptation straightforward:

/* Legacy Directional CSS (Requires manual overrides) */
.card { margin-left: 20px; text-align: left; }

/* Modern CSS Logical Properties (Auto-adapts to RTL) */
.card { margin-inline-start: 20px; text-align: start; }

2. Automated RTL attribute injection

When an RTL language is active, TranslateBeam TDN automatically updates the root HTML tag with dir="rtl" and lang="ar":

<html lang="ar" dir="rtl">

This signals the browser layout engine to mirror flexbox containers, table columns, and text alignment automatically without requiring duplicate stylesheets.

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