Making the leap to the pros is difficult for any NBA rookie. The players are better, the game faster, the concepts often more complex.

Hugo Gonzalez is facing all of those challenges in his first Celtics training camp — and doing so as a 19-year-old who’s new to American basketball and learning Boston’s system in his second language.

Gonzalez, a Spanish wing who came over from Real Madrid after the Celtics drafted him 28th overall in June, said mastering the team’s verbiage has been his biggest challenge thus far.

“I think that probably the language and the terms that we’ve got,” he said after Saturday’s practice at the Auerbach Center. “We’ve got a lot of terms that refer to different things, especially defensively, that we need a lot of communication. We’re working on it. So basically

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