ENGCOM-3249: Language cleanup on mass actions from the Customers grid #18751

Author: Stanislav Idolov

app/code/Magento/Customer/i18n/en_US.csv

@@ -506,10 +506,10 @@ Strong,Strong
 "Rebuild Customer grid index","Rebuild Customer grid index"
 Group,Group
 "Add New Customer","Add New Customer"
-"Are you sure to delete selected customers?","Are you sure to delete selected customers?"
+"Are you sure you want to delete the selected customers?","Are you sure you want to delete the selected customers?"
 "Delete items","Delete items"
 "Subscribe to Newsletter","Subscribe to Newsletter"
-"Are you sure to unsubscribe selected customers from newsletter?","Are you sure to unsubscribe selected customers from newsletter?"
+"Are you sure you want to unsubscribe the selected customers from the newsletter?","Are you sure you want to unsubscribe the selected customers from the newsletter?"
 "Unsubscribe from Newsletter","Unsubscribe from Newsletter"
 "Assign a Customer Group","Assign a Customer Group"
 Phone,Phone

app/code/Magento/Customer/view/adminhtml/ui_component/customer_listing.xml

@@ -49,7 +49,7 @@
             <action name="delete">
                 <settings>
                     <confirm>
-                        <message translate="true">Are you sure to delete selected customers?</message>
+                        <message translate="true">Are you sure you want to delete the selected customers?</message>
                         <title translate="true">Delete items</title>
                     </confirm>
                     <url path="customer/index/massDelete"/>
@@ -67,7 +67,7 @@
             <action name="unsubscribe">
                 <settings>
                     <confirm>
-                        <message translate="true">Are you sure to unsubscribe selected customers from newsletter?</message>
+                        <message translate="true">Are you sure you want to unsubscribe the selected customers from the newsletter?</message>
                         <title translate="true">Unsubscribe from Newsletter</title>
                     </confirm>
                     <url path="customer/index/massUnsubscribe"/>