Cramer's lightning round: nLIGHT 'is a speculative buy here'

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Duolingo's year-to-date stock performance.

Duolingo: "There's too many ways to be able to translate things now. I don't need to learn any language."

nLIGHT's year-to-date stock performance.

nLIGHT: "LASR is a speculative buy here."

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