In Oyebode vs. Oloyede (1999) 2 NWLR Part 592 page 523, the present Chief Justice of Nigeria, Mukhtar, CJN, when she was in the Court of Appeal had this to say: “Agreed that he gave evidence in Yoruba, but the question is, is that sufficient to assure that he could not read or understand English, or that he is illiterate? It may well be that he found it easier to testify in Yoruba, in open court and so elected to speak in his native language.”
TESTIFYING IN NATIVE LANGUAGE IS NOT PROOF OF ILLITERACY
It is also imperative to note that the fact that a witness opted to testify in his native language, is not a conclusive evidence that he is an illiterate. He may choose to do so because he feels much comfortable expressing himself in his mother-tongue, and not because he did not know how to write or read.
– T.N. Orji-Abadua, JCA. Kabau v. Rilwanu (2013) – CA/K/179/2001