Where can we find (Lost) ancient Indian text by Buddhist scholars which was Translated in other languages?

Where can we find (Lost) ancient Indian text by Buddhist scholars which was Translated in other languages? A Lot of Ancient Indian Buddhist text(Which was lost over a period of time with decline of Buddhism in India.) was translated(Probably from Sanskrit and Pali), specially by Tibetan, Chinese, Japanese, Korean, Sri Lankan Scholars. Where can we find these texts(may be translated in English.)