RTL (Right-to-Left)
Definition
RTL refers to writing systems such as Arabic and Hebrew that read right to left, requiring interfaces to mirror layout, alignment and directional elements rather than simply translating the text.
A correct RTL implementation uses logical CSS properties — inline-start and inline-end rather than left and right — so the layout adapts from the document direction. Sites built with physical properties and then flipped produce broken spacing, mirrored icons that should not mirror, and misplaced punctuation.
Mixed-direction content is where most implementations fail. An Arabic sentence containing a Latin brand name, a phone number or a price requires bidirectional handling, and getting it wrong reorders characters in ways that look careless to any Arabic reader.
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