diff --git a/src/i18n/strings/en_US.json b/src/i18n/strings/en_US.json
index bfc21a81d3..4a97b60a2e 100644
--- a/src/i18n/strings/en_US.json
+++ b/src/i18n/strings/en_US.json
@@ -658,5 +658,12 @@
     "Single Sign On": "Single Sign On",
     "Confirm adding this email address by using Single Sign On to prove your identity.": "Confirm adding this email address by using Single Sign On to prove your identity.",
     "Use Single Sign On to continue": "Use Single Sign On to continue",
-    "Message search initilisation failed": "Message search initialization failed"
+    "Message search initilisation failed": "Message search initialization failed",
+    "%(brand)s now uses 3-5x less memory, by only loading information about other users when needed. Please wait whilst we resynchronise with the server!": "%(brand)s now uses 3-5x less memory, by only loading information about other users when needed. Please wait while we resynchronize with the server!",
+    "Customise your experience with experimental labs features. <a>Learn more</a>.": "Customize your experience with experimental labs features. <a>Learn more</a>.",
+    "Customise your appearance": "Customize your appearance",
+    "Unrecognised command: %(commandText)s": "Unrecognized command: %(commandText)s",
+    "Add some details to help people recognise it.": "Add some details to help people recognize it.",
+    "Unrecognised room address:": "Unrecognized room address:",
+    "A private space to organise your rooms": "A private space to organize your rooms"
 }