The spelling of the word "khaldoun" depends on the language and writing system being used. In English, the spelling is derived from the Arabic name "Ibn Khaldun," a famous 14th century historian and philosopher. The correct IPA transcription is /kæl'duːn/. However, the spelling can vary depending on the language: in Arabic, it is spelled خلدون; in French, it is spelled Ibn Khaldoun; and in Spanish, it is spelled Ibn Jaldún. Despite these variations, the pronunciation remains the same.