Enriching low resource Statistical Machine Translation using induced bilingual lexicons

In this work we present an experiment for enriching a Statistical Machine Translation (SMT) phrase table with automatically created bilingual word pairs. The bilingual lexicon is induced with a supervised classifier trained using a joint representation of word embeddings (WE) and Brown clusters (BC) of translation equivalent word pairs as features. The classifier reaches a 0.94 F-score and the MT experiment results show an improvement of up to +0.70 BLEU over a low resource Chinese-Spanish phrase-based SMT baseline, demonstrating that bad entries delivered by the classifier are well handled.