Before revision:  Firstly, we introduce the phonemes as our modeling units for the multilingual setting . Similar phoneme always leads to similar visual patterns . The multilingual setting would increase both the quantity and the diversity of each phoneme shared among different languages. So the learning for the multilingual target should bring improvement to the prediction of phonemes .
After revision:  Firstly, we introduce the phonemes as our modeling units for the multilingual setting . Similar phoneme always leads to similar visual patterns no matter which type the target language is .