diff --git a/htdocs/langs/en_US/bills.lang b/htdocs/langs/en_US/bills.lang
index 7889424921d..60dfe9f5417 100644
--- a/htdocs/langs/en_US/bills.lang
+++ b/htdocs/langs/en_US/bills.lang
@@ -142,7 +142,7 @@ ConfirmDeleteBill=Are you sure you want to delete this invoice ?
 ConfirmValidateBill=Are you sure you want to validate this invoice with reference <b>%s</b> ?
 ConfirmClassifyPaidBill=Are you sure you want to change invoice <b>%s</b> to status paid ?
 ConfirmCancelBill=Are you sure you want to cancel invoice <b>%s</b> ?
-ConfirmCancelBillQuestion=why do you want to classify this invoice 'abandoned' ?
+ConfirmCancelBillQuestion=Why do you want to classify this invoice 'abandoned' ?
 ConfirmClassifyPaidPartially=Are you sure you want to change invoice <b>%s</b> to status paid ?
 ConfirmClassifyPaidPartiallyQuestion=This invoice has not been paid completely. What are reasons for you to close this invoice ?
 ConfirmClassifyPaidPartiallyReasonAvoir=Remainder to pay <b>(%s %s)</b> is a discount granted because payment was made before term. I regularise the VAT with a credit note.