diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListPublicFragment.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListPublicFragment.java
index eb0ae6309..c28d57627 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListPublicFragment.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/KeyListPublicFragment.java
@@ -313,7 +313,8 @@ public class KeyListPublicFragment extends Fragment implements AdapterView.OnIte
                         for (String userId : notDeleted) {
                             notDeletedMsg += userId + "\n";
                         }
-                        Toast.makeText(getActivity(), getString(R.string.error_can_not_delete_contacts, notDeletedMsg),
+                        Toast.makeText(getActivity(), getString(R.string.error_can_not_delete_contacts, notDeletedMsg)
+                                + getResources().getQuantityString(R.plurals.error_can_not_delete_info, notDeleted.size()),
                                 Toast.LENGTH_LONG).show();
 
                         mode.finish();
diff --git a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
index 0a7e06a62..14640480e 100644
--- a/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
+++ b/OpenPGP-Keychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeyActivity.java
@@ -475,7 +475,9 @@ public class ViewKeyActivity extends ActionBarActivity implements
                     if (returnData != null
                             && returnData.containsKey(DeleteKeyDialogFragment.MESSAGE_NOT_DELETED)) {
                         // we delete only this key, so MESSAGE_NOT_DELETED will solely contain this key
-                        Toast.makeText(ViewKeyActivity.this, R.string.error_can_not_delete_contact,
+                        Toast.makeText(ViewKeyActivity.this,
+                                getString(R.string.error_can_not_delete_contact)
+                                        + getResources().getQuantityString(R.plurals.error_can_not_delete_info, 1),
                                 Toast.LENGTH_LONG).show();
                     } else {
                         setResult(RESULT_CANCELED);
diff --git a/OpenPGP-Keychain/src/main/res/values/strings.xml b/OpenPGP-Keychain/src/main/res/values/strings.xml
index 6fc4678fe..ddc3c9789 100644
--- a/OpenPGP-Keychain/src/main/res/values/strings.xml
+++ b/OpenPGP-Keychain/src/main/res/values/strings.xml
@@ -283,8 +283,12 @@
     <string name="error_nfc_needed">NFC is not available on your device!</string>
     <string name="error_nothing_import">Nothing to import!</string>
     <string name="error_expiry_must_come_after_creation">expiry date must come after creation date</string>
-    <string name="error_can_not_delete_contact">you can not delete this contact because it is your own. Please delete it from the \'My Keys\' screen!</string>
-    <string name="error_can_not_delete_contacts">you can not delete the following contacts because they are your own:\n%sPlease delete them from the \'My Keys\' screen!</string>
+    <string name="error_can_not_delete_contact">you can not delete this contact because it is your own.</string>
+    <string name="error_can_not_delete_contacts">you can not delete the following contacts because they are your own:\n%s</string>
+    <plurals name="error_can_not_delete_info">
+        <item quantity="one">Please delete it from the \'My Keys\' screen!</item>
+        <item quantity="other">Please delete them from the \'My Keys\' screen!</item>
+    </plurals>
 
     <!-- progress dialogs, usually ending in '…' -->
     <string name="progress_done">done.</string>
@@ -409,7 +413,7 @@
 
     <!-- Key view -->
     <string name="key_view_action_encrypt">Encrypt to this contact</string>
-    <string name="key_view_action_certify">Certify key of this contact</string>
+    <string name="key_view_action_certify">Certify this contact's key</string>
 
     <!-- Navigation Drawer -->
     <string name="nav_contacts">Contacts</string>