El grillo è buon cantore che tiene longo verso.

According to Google Translate, this is an archaic version of the word “lungo.” Or it could just be a typo.

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https://tatoeba.org/eng/sentences/show/4613243

Given that Tatoeba is a wiki, we cannot take a translation as definitive just because it exists. Typos may originate there as easily as here. Also, note that the cited text is 500 years old.