Replace "Can delete" by "Delete" for consistency with other messages.
Can delete subpages of their own user page
Can delete own user and user talk page
Additionaly, action messages should be replaced
"action-delete-rootuserpages": "can delete own user and user talk page",
"action-delete-usersubpages": "can delete subpages of their own user page",
with
"action-delete-rootuserpages": "delete own user and user talk page",
"action-delete-usersubpages": "delete subpages of their own user page",
URL: https://translatewiki.net/wiki/MediaWiki:Right-delete-usersubpages/en
URL: https://translatewiki.net/wiki/MediaWiki:Right-delete-rootuserpages/en
URL: https://translatewiki.net/wiki/MediaWiki:Action-delete-usersubpages/en
URL: https://translatewiki.net/wiki/MediaWiki:Action-delete-rootuserpages/en
URL: https://gerrit.wikimedia.org/g/mediawiki/extensions/DeleteUserPages/+/a85d45f26a1c75f8b30dc5efcabec64b1ad53c60/i18n/en.json