If any mention or notification originates in a subpage of the user's talk page, the text doesn't seem to recognize it and states it as if it's "the talk page":
The example above is a notification from the subpage User_talk:MSchottlender-WMF/הנסיון_עם_הה on Hebrew wiki, but also happens in English. It might be better to not say "user talk page of..." when it's a subpage?
Pinging @jmatazzoni and @Pginer-WMF on this.