Kora: A Lost Khoisan Language Chapter 3: The Sounds of Kora
… we do not have enough reliable data (either from older sources or our own material) to offer them with certainty. … of vowel length that may have been given in the original sources. The reality, though, is that such indications were … as ?aes . In Kora, however, the spellings used by multiple sources suggest that the sound was most often heard as ai , …