T
- Tajikistan
- Tajik (national)
- Russian (for interethnic communication)
- Tanzania
- Swahili (national)
- English
- Thailand
- Thai
- Togo
- French
- Tonga
- English
- Tongan (national)
- Trinidad and Tobago
- English
- Tunisia
- Arabic (national)
- French
- Turkey
- Turkish
- Turkmenistan
- Turkmen (national)
- Russian (for interethnic communication)
- Tuvalu
- English
- Tuvaluan (national)
Read more about this topic: List Of Official Languages By State