diff --git a/locales/cy/browser/browser/zen-split-view.ftl b/locales/cy/browser/browser/zen-split-view.ftl
index 9c8bed8c7..2c1ac6ee6 100644
--- a/locales/cy/browser/browser/zen-split-view.ftl
+++ b/locales/cy/browser/browser/zen-split-view.ftl
@@ -15,6 +15,3 @@ zen-split-link =
 zen-split-view-modifier-header = Golwg Hollt
 zen-split-view-modifier-activate-reallocation = 
     .label = Galluogi ailddyrannu
-zen-split-view-modifier-enabled-toast = Mae aildrefnu'r olwg hollt YMLAEN
-zen-split-view-modifier-enabled-toast-description = Llusgwch a gollwng y golwg i'w haildrefnu. Pwyswch Esc i adael.
-zen-split-view-modifier-disabled-toast = Mae aildrefnu'r olwg hollt i FFWRDD.