I'm pretty sure you're thinking of C. S. Lewis' Out of the Silent Planet. It was first published in 1938, but it has been in print ever since in many editions.
It's set on Mars, but most of the story (and all the bits you mention, above,) happen deep in one of the canyons that from Earth we see as canals, and they're wet and tropical.
The main Martian race (there are three) that Ransom – the main character – encounters has a language which begins many words with an "H". They call themselves the "Hross" and the word for any intelligent being is "hnau" Ransom goes with his Martian friends to hunt a dangerous beast and kills it and is declared an "hnakrapunt".
The part about the drink from the pouch is also there:
In its hand (he was already thinking of its webbed fore-paw as a hand) it was carrying what appeared to be a shell – the shell of some oyster-like creature, but rounder and more deeply domed. It dipped the shell in the lake and raised it full of water. Then it held the shell to its own middle and seemed to be pouring something into the water. Ransom thought with disgust that it was urinating in the shell. Then he realized that the protuberances on the creature's belly were not genital organs nor organs at all; it was wearing a kind of girdle hung with various pouch-like objects, and it was adding a few drops of liquid from one of these to the water in the shell. This done it raised the shell to its black lips and drank – not throwing back its head like a man but bowing it and sucking like a horse. When it had finished it refilled the shell and once again added a few drops from the receptacle – it seemed to be some kind of skin bottle – at its waist. Supporting the shell in its two arms, it extended them towards Ransom. The intention was unmistakable. Hesitantly, almost shyly, he advanced and took the cup. His fingertips touched the webbed membrane of the creature's paws and an indescribable thrill of mingled attraction and repulsion ran through him; then he drank. Whatever had been added to the water was plainly alcoholic; he had never enjoyed a drink so much.