diff --git a/website/src/locales/cs.json b/website/src/locales/cs.json
index 960bd557..2cfbef2a 100644
--- a/website/src/locales/cs.json
+++ b/website/src/locales/cs.json
@@ -272,6 +272,7 @@
             "finlandTopo": "Lantmäteriverket Terrängkarta",
             "bgMountains": "BGMountains",
             "usgs": "USGS",
+            "bikerouterGravel": "bikerouter.de Gravel",
             "cyclOSMlite": "CyclOSM Lite",
             "swisstopoSlope": "swisstopo Slope",
             "swisstopoHiking": "swisstopo Hiking",