Jubelton is a compound word combining "Jubel" (jubilation/cheer) and "Ton" (sound/tone). It literally translates to "sound of jubilation" or "cheering sound".
In the context of this traditional Christmas carol, it refers to the joyful and celebratory sound that everyone should join in with, as it announces the arrival of Christmas and the "Light of the World". It's a festive and evocative word that perfectly captures the spirit of the season.
"Fröhliche Weihnacht überall" opens on the plainest possible refrain: "Fröhliche Weihnacht überall!" ["Merry Christmas everywhere!"], "Tönet durch die Lüfte froher Schall" ["A joyful sound rings through the air"]. Each pass through it adds one more physical trace of the holiday — "Weihnachtston, Weihnachtsbaum" ["Christmas sound, Christmas tree"], "Weihnachtsduft in jedem Raum" ["Christmas scent in every room"] — before naming why any of it matters: "Denn es kommt das Licht der Welt / Von des Vaters Thron" ["Because the light of the world is coming / From the father's throne"].
The second verse turns that light into something to walk by — "Licht auf dunklem Wege / Unser Licht bist du" ["Light on a dark path / You are our light"], "Denn du führst, die dir vertrauen" ["For you lead those who trust you"] — and the last verse turns it back toward other people: "Was wir ander'n taten / Sei getan für dich" ["What the rest of us did / Be done for you"], closing on "Christkind kam für mich" ["Christ child came for me"].