The spelling of the word "keiser" may seem unusual to native English speakers. However, this is the standard spelling in Norwegian and Danish for the word "emperor". The correct pronunciation is /ˈkaɪzər/ in English, which follows the International Phonetic Alphabet (IPA). The 'k' sound in 'keiser' is pronounced like the letter 'k', followed by a long 'i' sound and a soft 'z' sound. Using IPA notation can help learners and speakers of different languages to better understand correct pronunciation.
The word keiser is derived from the Old High German word keisar which itself comes from the Latin word caesar. In Latin, caesar originally referred to the Roman family name of Julius Caesar, but it eventually became a title for Roman emperors. The word spread to various Germanic languages, including Old High German, where it evolved into keisar and later into keiser. Over time, the spelling and pronunciation of keiser changed to kaiser, which is the modern German term for emperor.