The Beilu Yiyu () also known as Yiyu is a Ming-era Mongol-Chinese dictionary.
References
Further reading Ákos Bertalan Apatóczky: Yiyu 譯語 (Beilu yiyu 北虜譯語). An indexed critical edition of a 16th century Sino-Mongolian glossary. Global Oriental Publishers, Brill, 2009.