Monarchial system
| Languages | States |
|---|---|
| English | Swaziland |
| English | Tonga |
| Arabic | Saudi Arabia |
| Arabic | Bahrain |
| Arabic | United Arab Emirates |
| Arabic | Jordan |
| Arabic | Kuwait |
| Arabic | Morocco |
| Arabic | Oman |
| Arabic | Qatar |
| Italian | Vatican |
| Latin | Vatican |
| Malay | Brunei |
| Swati | Swaziland |
| Tongan | Tonga |
| 1 to 40 (16) | |