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+---
+epic: 14
+story: 14.4
+title: "RTL Language Support"
+status: draft
+---
+
+## Epic 14 — Accessibility & Internationalization
+**Goal:** Make CalcPad usable by everyone regardless of ability, language, or locale.
+
+### Story 14.4: RTL Language Support
+
+As a user who writes in Arabic or Hebrew,
+I want the CalcPad interface to mirror for right-to-left languages,
+So that the layout feels natural and text flows in the correct direction.
+
+**Acceptance Criteria:**
+
+**Given** the user's system locale or CalcPad language preference is set to an RTL language (Arabic or Hebrew)
+**When** the application renders
+**Then** the overall layout is mirrored: sidebar appears on the right, toolbar items are right-aligned, text input is right-aligned
+**And** the result column position mirrors accordingly
+
+**Given** an RTL layout is active
+**When** the user types numeric expressions (e.g., `150 * 3`)
+**Then** numbers and mathematical operators remain in left-to-right order
+**And** variable names containing Latin characters remain LTR within the RTL context (bidirectional text handling)
+
+**Given** an RTL layout is active
+**When** mixed content appears (Arabic label text with numeric expressions)
+**Then** the Unicode Bidirectional Algorithm is applied correctly
+**And** the visual order of the expression is mathematically readable
+
+**Given** the user switches between an RTL and LTR language in settings
+**When** the language change is applied
+**Then** the layout mirrors or un-mirrors immediately without requiring an application restart