How would we know? They've been lost. Also, poetic value is subjective. Historical value, in the sense of helping us understand things we didn't previously, mu

How would we know? They've been lost. Also, poetic value is subjective. Historical value, in the sense of helping us understand things we didn't previously, much less so. You may not find a phrase in a given language "poetic," but knowing that native speakers of said language did may be quite valuable.