1. A method comprising: obtaining, by a system comprising a processor, information associated with an acoustic model, wherein the acoustic model is trained on native speech in a target dialect; and updating, by the system, the information associated with the acoustic model to replace a first phoneme in the acoustic model with a second phoneme, wherein the second phoneme comprises a sum of values associated with plausible phonemes in a lattice of plausible phonemes associated with a type of speaker.