As an embedding-based approach to bilingual lexicon induction, the model consists of matrices W S ∈ R D×V S and W T ∈ R D×V T , which pack up D-dimensional word embeddings of source and target languages with vocabulary sizes V S and V T , respectively.
then the translations in the target language are queried again in the reverse direction to translate back to the source language, and those that don't match with the original source words are discarded.