The spelling of the word "Carllen" can be a bit confusing at first glance. However, the IPA phonetic transcription can help shed some light on its correct spelling. The word is pronounced as /ˈkɑːrlən/, indicating that it begins with a hard "c" sound, followed by the "a" sound as in "car" and ends with a soft "l" sound and an "en" sound, as in "llen". Therefore, the correct spelling of this word is "Carllen".