silverstripe-gridfieldextensions/client/lang/src/en.json

{
    "GridFieldExtensions.CONFIRMDEL": "Are you sure you want to delete this?",
    "GridFieldExtensions.ADD_CLASS": "Add: <i>{classname}</i>",
    "GridFieldExtensions.OPEN_SEARCH_FILTER": "Open search and filter",
    "GridFieldExtensions.SAVE_PUBLISH": "Save & publish"
}