diff --git a/gtfs/spec/en/reference.md b/gtfs/spec/en/reference.md
index 67a16b01b..fdc5ffb21 100644
--- a/gtfs/spec/en/reference.md
+++ b/gtfs/spec/en/reference.md
@@ -82,6 +82,7 @@ This specification defines the following files:
 |  [transfers.txt](#transferstxt)  | Optional | Rules for making connections at transfer points between routes. |
 |  [pathways.txt](#pathwaystxt)  | Optional | Pathways linking together locations within stations. |
 |  [levels.txt](#levelstxt)  | Optional | Levels within stations. |
+|  [translations.txt](#translationstxt)  | Optional | Translations of customer-facing dataset values. |
 |  [feed_info.txt](#feed_infotxt)  | Optional | Dataset metadata, including publisher, version, and expiration information. |
 |  [attributions.txt](#attributionstxt)  | Optional | Dataset attributions. |