We know that cotton top tamarins have at least 38 calls, the calls have a grammatical structure, the calls are learned, and comprehension comes before usage ma

We know that cotton top tamarins have at least 38 calls, the calls have a grammatical structure, the calls are learned, and comprehension comes before usage mastery. That pretty much qualifies as a language. https://en.wikipedia.org/wiki/Cotton-top_tamarin https://en.wikipedia.org/wiki/Cotton-top_tamarin