Fix missing translation keys

htdocs/langs/en_US/agenda.lang

@@ -78,6 +78,11 @@ InvoiceDeleted=Invoice deleted
 PRODUCT_CREATEInDolibarr=Product %s created
 PRODUCT_MODIFYInDolibarr=Product %s modified
 PRODUCT_DELETEInDolibarr=Product %s deleted
+EXPENSE_REPORT_CREATEInDolibarr=Expense report %s created
+EXPENSE_REPORT_VALIDATEInDolibarr=Expense report %s validated
+EXPENSE_REPORT_APPROVEInDolibarr=Expense report %s approved
+EXPENSE_REPORT_DELETEInDolibarr=Expense report %s deleted
+EXPENSE_REPORT_REFUSEDInDolibarr=Expense report %s refused
 ##### End agenda events #####
 AgendaModelModule=Document templates for event
 DateActionStart=Start date