i18n: correct rank doc comments and pin the Polish wording

1 files changed, 5 insertions, 1 deletions

diff --git a/internal/liturgy/section.go b/internal/liturgy/section.go
index 485a45f..baf2b9d 100644
--- a/internal/liturgy/section.go
+++ b/internal/liturgy/section.go
@@ -36,6 +36,10 @@ type DayInfo struct {
 	// Rank is the normalized liturgical rank of the observed celebration:
 	// the Ordinary Form's "ferial", "optional", "memorial", "feast",
 	// "solemnity", or the 1962 form's "class-1".."class-4",
-	// "commemoration". Empty when the day carries no rank.
+	// "commemoration". The engine always supplies a rank: an unset or
+	// unrecognised rank on a sanctoral celebration defaults to "ferial"
+	// (calendar.buildCelebration), and every temporal-day constructor sets
+	// one explicitly. Consumers must not treat an empty Rank as meaning "no
+	// celebration".
 	Rank string
 }