The spelling of "Mark Caine" is fairly straightforward as it is simply a first and last name. In IPA phonetic transcription, the pronunciation of "Mark" would be /mɑrk/ with the "r" being a retroflex approximant sound. The pronunciation of "Caine" would be /keɪn/ with the "ai" diphthong being a combination of the vowel sounds /e/ and /ɪ/. Overall, the spelling of "Mark Caine" accurately reflects its pronunciation in English.