diff --git a/lang/en.json b/lang/en.json
index 9e042c29..24e72e11 100644
--- a/lang/en.json
+++ b/lang/en.json
@@ -1532,5 +1532,14 @@
   "pdf_received_from": "Received from:",
   "pdf_tax_label": "Tax",
   "pdf_tax_id": "Tax-ID",
-  "pdf_vat_id": "VAT-ID"
+  "pdf_vat_id": "VAT-ID",
+  "mail_thanks": "Thanks",
+  "mail_view_estimate": "View Estimate",
+  "mail_viewed_estimate": ":name viewed this Estimate.",
+  "mail_view_invoice": "View Invoice",
+  "mail_viewed_invoice": ":name viewed this Invoice.",
+  "mail_view_payment": "View Payment",
+  "notification_view_estimate": "[Notification] Estimate viewed",
+  "notification_view_invoice": "[Notification] Invoice viewed",
+  "You have received a new invoice from <b>{COMPANY_NAME}</b>.</br> Please download using the button below:": "You have received a new invoice from <b>{COMPANY_NAME}</b>.</br> Please download using the button below:"
 }