diff --git a/elements/securite_des_machines/barrage_immateriel/keyence/qet_directory b/elements/securite_des_machines/barrage_immateriel/keyence/qet_directory
index 20d4c6472..1aa710880 100644
--- a/elements/securite_des_machines/barrage_immateriel/keyence/qet_directory
+++ b/elements/securite_des_machines/barrage_immateriel/keyence/qet_directory
@@ -5,5 +5,6 @@
         <name lang="it">Keyence</name>
         <name lang="es">Keyence</name>
         <name lang="el">Keyence</name>
+        <name lang="cs">Keyence</name>
     </names>
 </qet-directory>
diff --git a/elements/securite_des_machines/inter_de_pos_de_securite/qet_directory b/elements/securite_des_machines/inter_de_pos_de_securite/qet_directory
index 66de59a89..3abf89499 100644
--- a/elements/securite_des_machines/inter_de_pos_de_securite/qet_directory
+++ b/elements/securite_des_machines/inter_de_pos_de_securite/qet_directory
@@ -3,5 +3,6 @@
         <name lang="en">Safety interlocks</name>
         <name lang="fr">Interrupteur de position de sécurité</name>
         <name lang="pl">Blokady bezpieczeństwa</name>
+        <name lang="cs">Bezpečnostní zábrany</name>
     </names>
 </qet-directory>
diff --git a/elements/securite_des_machines/qet_directory b/elements/securite_des_machines/qet_directory
index 2f10b8a59..ab28394b1 100644
--- a/elements/securite_des_machines/qet_directory
+++ b/elements/securite_des_machines/qet_directory
@@ -5,5 +5,6 @@
         <name lang="it">Sicurezza delle macchine</name>
         <name lang="en">Security machine</name>
         <name lang="el">Ασφάλεια μηχανών</name>
+        <name lang="cs">Bezpečnost strojů</name>
     </names>
 </qet-directory>