| Title | Tonal | Agglutinative language | Number of Native speakers | Total Number of Speakers | No. of Countries Spoken In | ||
| Korean | No | Yes | 75 | 78 | 5 | ||
| Kiswahili (Swahili) | No | Yes | 5 | 10 | 14 | ||
| Khmer | No | No | 7 | 21.6 | 6 | ||
| Kannada | No | Yes | 33.7 | 60 | 7 | ||
| Jinyu | Yes | No | 45 | 45 | 2 | ||
| Javanese | No | No | 75.5 | 80 | 4 | ||
| Japanese | No | Yes | 125 | 130 | 4 | ||
| Italian | No | No | 59 | 62 | 12 | ||
| Indonesian (Bahasa) | No | No | 35 | 180 | 1 | ||
| Igbo | Yes | No | 18 | 25 | 3 | ||