The redesign brief describes "adding Arabic to the current design" rather than building a separate RTL design system
Arabic is not a content layer that can be added to an existing English design system. An English-language e-commerce store is built on a left-to-right layout: navigation flows left to right, icons point in the direction of user progression (a right-pointing arrow means "next"), text anchors left, and the visual hierarchy is designed for a reader who scans from left to right. An Arabic version of the store requires a complete mirror of this system: navigation flows right to left, icons must be directionally flipped, text anchors right, and the visual hierarchy is designed for a reader who scans from right to left. Arabic web typography requires specific font choices — not all Arabic fonts render correctly at screen sizes, and Latin web fonts cannot be substituted. A brief that describes "adding Arabic" to the English design will produce an Arabic version that feels incorrect to Arabic-speaking buyers, because it is the English layout with Arabic text inside it.