go to User_talk:Tom29739 on every wiki (except on enwiki)
and prepend this text:
My main talk page is on the English Wikipedia. Click here to go there. I may not reply to messages on other wiki talk pages, so please notify me on enwiki if there is a message I need to see on another wiki. Thanks, Tom29739 (talk)
Hello Tom29739. Crosswiki notifications will soon be deployed, so you'll be notified when you have new messages on any wiki. (You can try this feature now before it's turned on for everyone.) Do you still want to continue with this request? —Pathoschild 18:57, 02 April 2016 (UTC)
@Pathoschild:, I don't want to continue with this request then. Thanks for telling me about the feature. Thanks, Tom29739 (talk) 12:06, 9 April 2016 (UTC).