K
- Kazakhstan
- Kazakh (national)
- Russian
- Kenya
- English
- Swahili (national)
- Kiribati
- English
- Kiribati (national)
- North Korea
- Korean
- South Korea
- Korean
- Kosovo
- Albanian language
- Serbian language
- Kuwait
- Arabic
- Kyrgyzstan
- Kirghiz (national)
- Russian
Read more about this topic: List Of Official Languages By State