The first scholar to question the existence of "Hamitic languages" was Marcel Cohen in  1924, with skepticism also expressed by A. Klingenheben and Dietrich Westermann during the 1920s and '30s.
ðə fˈɜːst skˈɑːlɚ tə kwˈɛstʃən ðɪ ɛɡzˈɪstəns ʌv "hæmˈɪɾɪk lˈæŋɡwɪdʒᵻz" wʌz mɑːɹsˈɛl kˈoʊən ɪn nˈaɪntiːnhˈʌndɹɪd twˈɛnti fˈoːɹ, wɪð skˈɛptɪsˌɪzəm ˈɔːlsoʊ ɛkspɹˈɛst baɪ ˈeɪ. klˈɪndʒənhˌɛbən ænd dˈaɪətɹɪtʃ wˈɛstɚmən dˈʊɹɹɪŋ ðə nˈaɪntiːnhˈʌndɹɪd twˈɛnti z ænd θˈɜːɾi z.