The word "Ruppel" is spelled with two "p"s and one "l". Its phonetic transcription in the International Phonetic Alphabet (IPA) is /ˈrʌpəl/. The first syllable is pronounced with a short "u" sound, followed by a "p" sound produced with a slight aspiration. The second syllable is pronounced with an unstressed "schwa" sound, followed by a single "l" sound. The spelling of "Ruppel" may vary slightly in different languages, but the IPA pronunciation remains the same.