Cataloging and accessing non-roman languages, such as the languages in the JACKPHY group, have been better served because of the inclusion of vernacular langues such as Thai, Lao or even Burmese present other problems for catalogers because only romanized versions of these languages are present in current bibliographic records. The problems in cataloging and accessing the materials in these languages occur not only because of the romanization system but also due to the nature of the languages themselves. This paper presents a number of problems related to the cataloging of Thai language materials.