diff --git a/src/Offer/ReadModel/JSONLD/OfferLDProjector.php b/src/Offer/ReadModel/JSONLD/OfferLDProjector.php
index <HASH>..<HASH> 100644
--- a/src/Offer/ReadModel/JSONLD/OfferLDProjector.php
+++ b/src/Offer/ReadModel/JSONLD/OfferLDProjector.php
@@ -94,6 +94,9 @@ abstract class OfferLDProjector implements OrganizerServiceInterface
     protected $eventsNotTriggeringUpdateModified;
 
     /**
+     * Associative array of bases prices.
+     * Key is the language, value is the translated string.
+     *
      * @var string[]
      */
     private $basePriceTranslations;
III-<I> Add comment about base price translations being an associative array.