diff --git a/htdocs/langs/en_US/propal.lang b/htdocs/langs/en_US/propal.lang
index 3957019c3a2..d3827a76e34 100644
--- a/htdocs/langs/en_US/propal.lang
+++ b/htdocs/langs/en_US/propal.lang
@@ -57,6 +57,6 @@ DateEndPropalShort=Date end
 ValidityDuration=Validity duration
 CloseAs=Close with status
 ClassifyBilled=Classify billed
-BuildBill=Build bill
-RelatedBill=Related bill
-RelatedBills=Related bills
\ No newline at end of file
+BuildBill=Build invoice
+RelatedBill=Related invoice
+RelatedBills=Related invoices
\ No newline at end of file