The French Christmas classic, Patapan, arranged by Kevin Weed.
Choir is basically 2 parts: S/B and A/T/
Sopranos and basses sing in octaves. And the Altos and Tenors sing in unison to help with unchanged boys voices.
Accompaniment is penny whistle and drum. Instead of penny whistle, flute, piccolo or perhaps even recorder would work, or perhaps some other folk flute, or keyboard sound.

This arrangement of the familiar song Patapan uses the original tune and lyrics, written in 1720, by Bernard de La Monnoye, in the French Burgundian dialect. He is recalling earlier times of revelry.
This arrangement uses only the first verse from the original song:

Guillô, pran ton tamborin;
Toi, pran tai fleúte, Rôbin!
Au son de cé instruman
Turelurelu, patapatapan,
Au son de cé instruman
Je diron Noei gaiman.

The sense of the original 3verse song is: Willy and Robin play your drum and help us celebrate Christmas, as in olden days instruments were used to praise the high kings.

https://kevinweed.com/patapan/