A parasite causes some degree of harm to the host, whereas a symbiont lives together with the host and does not cause harm. When both benefit it is called a symbiotic relationship
I chuckled when you said "a third language" - most Americans can't even speak good English, let alone a second language 🙂 As always thanks for the reactions Vic!
A manifest lists the people or things included in a shipment. Japanese doesn't come from Mandarin (although they borrowed a lot words from it,, even numbers) but kanji are based on Chinese characters, usually simplified slightly.