Abstract: Embodiments of the invention disclose a system and a method for constructing a pronunciation dictionary by transforming an unaligned entry to an aligned entry. The unaligned entry and the aligned entry include a set of words and a set of pronunciations corresponding to the set of words. The method aligns each word in the aligned entry with a subset of pronunciations by determining a pronunciation prediction for each word, such that there is one-to-one correspondence between the word and the pronunciation prediction; mapping each pronunciation prediction to the subset of pronunciations to produce a predictions-pronunciation map having each pronunciation prediction aligned with the subset of pronunciations; and determining the aligned entry based on the predictions-pronunciation map using the one-to-one correspondence between the word and the pronunciation prediction.