You can use this template to notify users about usurpation requests.
A list of local equivalent templates can be found on Wikidata. You might want to use those where they exist.
Please select a language and use the text without <translate> tags by using the button "View raw source":
Request for usurpationEdit
Hello, Usurpation requested. A request has been made via SRUC (metawiki) to usurp, or "take over", your username because another user would like to use it to edit.
If you do not object to being renamed to a new username in order for another user to use the name you currently have, please log in and post a reply here saying so (you may also tell us what username you would like to be renamed to, or we will provide you with a generic one) or use Special:GlobalRenameRequest.
If you do nothing, the request may be filled shortly, and your account will be moved to a generic username. You may request that it be moved to a new username of your choice at any time.
If you object to being renamed, please log in and make an edit to this page clearly stating that you object to usurpation. Any objection on your part will prevent usurpation.
Please note that even if your current username is usurped, you can still edit and your data will not be lost; your preferences, watchlist, and other user settings will be transferred to a new username.
Thank you for your time.