📄 Article

Fix Outlook for Mac Language Issues: RTL Limitation and Spell Check Not Working

✍️ Author: Techcareers
📂 Category: Microsoft 365 / Outlook for Mac
👥 Audience: IT Administrators / End-User Support Engineers
📅 Last Reviewed: July 2, 2026

Organizations using Microsoft Outlook on macOS may encounter issues when working with Arabic language settings — particularly around right-to-left (RTL) text behavior and spell check functionality. While spell check can typically be configured successfully, bidirectional text support on macOS has known limitations that impact Outlook’s behavior.

This article outlines the symptoms, root cause, and validated resolution/workarounds based on real-world troubleshooting.

🔍 The Symptoms / Error Message

⚠️ What You May Experience

Selecting Arabic language in Outlook for Mac does not switch text direction to right-to-left (RTL)
Arabic text appears left-aligned instead of properly formatted RTL
Spell check and grammar initially do not detect Arabic text correctly

🧠 Root Cause

1. RTL (Right-to-Left) Limitation on macOS

💡 Why This Happens

Outlook for Mac relies on macOS system-level text rendering frameworks. Unlike Outlook for Windows, full bidirectional (BiDi) editing and RTL UI behavior is not fully supported on macOS applications, including Outlook.

This is a platform limitation, not a configuration issue in Outlook.

2. Spell Check Configuration

💡 Common Causes

Missing Arabic language pack in macOS
Incorrect Outlook language configuration
macOS keyboard/input source not aligned with selected language

🛠️ Step-by-Step Resolution

✅ Fix 1: Ensure Arabic Spell Check Works in Outlook for Mac

Configure macOS language support first, then align Outlook’s spelling settings.

📋 macOS System Configuration

Go to System Settings → Keyboard
Click Text Input → Input Sources
Add Arabic language input
Go to System Settings → General → Language & Region
Add Arabic as a preferred language (optional but recommended)

📋 Outlook for Mac Configuration

Open Outlook
Navigate to Preferences
Select Spelling & Grammar
Ensure ✔ Check spelling as you type and ✔ Automatically correct spelling are enabled
Compose a new email
Type Arabic text and right-click → Select Arabic for spell checking

💡 Outcome

✅ Spell check and grammar should now work correctly (as validated in testing).

⚠️ Fix 2: Workaround for RTL Text Direction (Arabic)

Outlook for Mac does not provide native RTL text direction controls (like “Right-to-Left Text Direction” available in Windows Outlook). Use one of the workarounds below.

📋 Option 1: Use macOS Direction Controls

Use the macOS built-in shortcut: CTRL + CMD + D (limited support; may not work consistently in Outlook)

📋 Option 2: Use Microsoft Word (Mac) for RTL Authoring

Open Microsoft Word (Mac)
Set paragraph direction to Right-to-Left
Compose content
Copy and paste into Outlook

📋 Option 3: Use Outlook on Windows (Recommended)

For full Arabic language support, use Outlook for Windows
Or Outlook Web (limited RTL support but better than Mac)

💡 Best Practices & Recommendations

For users requiring full Arabic RTL experience, deploy Outlook for Windows or OWA
Ensure macOS language packs and keyboard inputs match business language requirements
Standardize client platforms in multilingual environments to avoid inconsistent behaviors
Educate users on platform limitations vs. configuration issues to reduce unnecessary escalations

✅ Key Takeaway

✔ Spell check issues in Outlook for Mac can be resolved through proper language configuration.

❌ Arabic RTL behavior is a known macOS platform limitation with no native fix in Outlook.

📚 References & Further Reading

🔗 Use bidirectional text on Mac — Apple Official Guide

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