Pronunciation: [sˈɒndəklˌas] (IPA)
Correct spelling for the English word "Sonderclass" is [sˈɒndəklˌas], [sˈɒndəklˌas], [s_ˈɒ_n_d_ə_k_l_ˌa_s] (IPA phonetic alphabet).
Correct spelling for Sonderclass