The spelling of the word "Flannen" may seem confusing to some, but it can be explained with IPA phonetic transcription. The first syllable "Flan" is pronounced as /flæn/ with a short 'a' sound, followed by the double 'n' which makes the 'n' sound longer. The second syllable "nen" is pronounced as /nɛn/, with a short 'e' sound followed by the 'n' sound. Thus, the correct spelling of the word is "Flannen" and it is pronounced as /ˈflænən/ in IPA.