Dinka is one of the languages of Sudan (Africa).
For more information, see SIL Ethnologue for Sudan.
You can listen to an audio version of the Dinka New Testament online at AudioScriptures.org.
The "JESUS" Film, based on the Gospel of Luke, has been translated into two dialects of Dinka - Northeastern (Padang) and South Central (Agar). You can view it online or order a copy from www.jesusfilmstore.org. Or order by phone from Campus Crusade at 1-800-432-1997.
The Four Spiritual Laws gospel tract has been translated into Dinka. Download a free pdf or purchase the Print Your Own Gospel Tracts CD from Campus Crusade.