3. The method of claim 2 , further comprising: determining, by the computing device, first-language assignments between the plurality of first-language speech sounds and a plurality of first-language phonemes, and second-language assignments between the plurality of second-language speech sounds and the plurality of second-language phonemes; and determining a mapping configured to associate the plurality of first-language speech sounds with the plurality of second-language speech sounds, wherein determining the cross-lingual assignments is based on the mapping and the second-language assignments.
3. The method of claim 2 , further comprising: determining, by the computing device, first-language assignments between the plurality of first-language speech sounds and a plurality of first-language phonemes, and second-language assignments between the plurality of second-language speech sounds and the plurality of second-language phonemes; and determining a mapping configured to associate the plurality of first-language speech sounds with the plurality of second-language speech sounds, wherein determining the cross-lingual assignments is based on the mapping and the second-language assignments. 4. The method of claim 3 , further comprising: receiving configuration input comprising a first audio signal that includes speech content in the first language, a sequence of first-language phonemes that are assigned to a portion of the first audio signal, a second audio signal that includes speech content in the second language, and a sequence of second-language phonemes that are assigned to a portion of the second audio signal; and based on the configuration input, determining the plurality of first-language speech sounds, the plurality of first-language phonemes, the plurality of second-language speech sounds, the plurality of second-language phonemes, the first-language assignments, and the second-language assignments.