From Entertainment to Education: The episode is sometimes taught in communications classes, due to its premise of friendly communication between cultures that are at first incomprehensible to each other.
The river Temarc in winter: Be quiet/silence/stop at once!
Kurlash, when it rises: When something stays lifted and supported. (Possibly a baked food?)
Kalimash at Bahar: Everything is okay.
Zinda, his face black, his eyes red: Anger or conflict, also can indicate pain or discomfort, possible indication of inability to survive (either self, or other party)
Kiazi's Children, their faces wet: Do not be concerned/It's nothing.
Rai and Jiri at Lungha. Rai of Lowani. Lowani under two moons. Jiri of Ubaya. Ubaya of crossroads, at Lungha. Lungha, her sky gray: The longest "sentence". It probably necessitates a bit of split up:
Rai and Jiri at Lungha: A meeting between two people; intended as a friendly, open greeting.
Rai of Lowani. Lowani under two moons: We are Tamarians. We hail from the planet Tama.
Jiri of Ubaya: Noting another entity is a federation/organisation.
Ubaya of crossroads, at Lungha: Noting that a federation/organisation consists of a multitude of different peoples/cultures.
Lungha, her sky gray: Sending someone a message, in the hope of establishing a cordial relation.