diff --git a/htdocs/langs/en_US/projects.lang b/htdocs/langs/en_US/projects.lang
index 6d062056d4d..c06743613ad 100644
--- a/htdocs/langs/en_US/projects.lang
+++ b/htdocs/langs/en_US/projects.lang
@@ -255,3 +255,7 @@ ProjectFollowTasks=Follow tasks
 UsageOpportunity=Usage: Opportunity
 UsageTasks=Usage: Tasks
 UsageBillTimeShort=Usage: Bill time
+InvoiceToUse=Draft invoice to use
+NewInvoice=New invoice
+OneLinePerTask=One line per task
+OneLinePerPeriod=One line per period
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