The spelling of the word "Kwang" can be explained using the International Phonetic Alphabet (IPA) transcription. The word is pronounced as /kwæŋ/ with the initial consonant sound being /k/, followed by the diphthong sound of /wæ/ and ending with a velar nasal sound of /ŋ/. The spelling of this word may be challenging for those who are not familiar with diphthongs and nasal sounds, but with practice and understanding of IPA, it can be easily mastered.