Revert "Remove redundant language strings."

This reverts commit 1070d1ab.

themes/bootstrap3/templates/layout/layout.phtml

@@ -37,6 +37,13 @@
             'collection_empty' => 'collection_empty',
             'error_occurred' => 'An error has occurred',
             'go_to_list' => 'go_to_list',
+            'libphonenumber_invalid' => 'libphonenumber_invalid',
+            'libphonenumber_invalidcountry' => 'libphonenumber_invalidcountry',
+            'libphonenumber_invalidregion' => 'libphonenumber_invalidregion',
+            'libphonenumber_notanumber' => 'libphonenumber_notanumber',
+            'libphonenumber_toolong' => 'libphonenumber_toolong',
+            'libphonenumber_tooshort' => 'libphonenumber_tooshort',
+            'libphonenumber_tooshortidd' => 'libphonenumber_tooshortidd',
             'loading' => 'Loading',
             'more' => 'more',
             'number_thousands_separator' => [