Tumbuka (aka ChiTumbuka) is a language of Malawi (Africa).
For more information, see SIL Ethnologue code tum.
You can purchase the Tumbuka New Testament in audio format from Faith Comes By Hearing.
For information on the availability of the Tumbuka Bible in print, please contact the Bible Society in Malawi.
The "JESUS" Film, based on the Gospel of Luke, has been translated into Tumbuka. To order, visit jesusfilmstore.org. Or order by phone from Campus Crusade at 1-800-432-1997.