In crossing geekdoms, the Tamarian language comes from a Star Trek:The Next Generation episode called "Darmok"; from which viewers always recall the phrase "Darmok and Jalad". In the language, they use metaphors, symbolism, and stories to communicate. A classic example is, "Sokath, his eyes uncovered," which means to understand.
Given that, would Comprehend Language work on such a language?
It's not "artificial", it's a fully developed language with syntax and grammar. It's not coded in any way like Thieves' Cant. They say exactly what they mean to communicate.
When they say, "Temba, his arms wide/open," it's literally about Temba and how they held their arms. But the actual meaning is about giving a gift.
The spell states, "you understand the literal meaning of any spoken language that you hear." So would the caster hear literally about a person in a hug pose, or would they get the meaning of gift?