DannyS712's "global watchlist" is a user script that can be used to create a "global" watchlist view.
It is no longer maintained, now that the GlobalWatchlist extension is deployed on Meta, and use of the user script is discouraged.
A stable version is available at User:DannyS712/Global watchlist/stable.js.
To subscribe to news and updates regarding the script, including new releases and breaking changes, add your talk page to User:DannyS712/Global watchlist/Updates.
Message translation is done at User:DannyS712/Global watchlist/Translate.