The spelling of the word "ISNLAN" might seem strange, but it can be explained with the International Phonetic Alphabet (IPA) transcription. The first two letters, "IS," represent the short vowel sound "ɪ" and are followed by "NL," which represents the consonant sounds "n" and "l" using the "ŋl" diagraph. Finally, "AN" is pronounced with a short "æ" vowel sound. So, "ISNLAN" is pronounced as "ɪŋlæn." Understanding IPA can help improve one's spelling abilities and assist in language learning.