Very small UX change, "confusable" is a word that is indeed valid, but
when you look it up online, it doesn't take long for this adjective to
appear in [its technical Unicode-related
context](https://util.unicode.org/UnicodeJsps/confusables.jsp). I think
that it throws me off as a person that doesn't speak English natively.
I think that this could be replaced with "can be confused with". As the
change is very small and purely a matter of preference, if you (the
maintainer) believe that this shouldn't be included, feel free to close
this without any further discussion, as your time would probably be
better used elsewhere.
I've heard many reports of users getting scared when they see their own
email address for their own profile, as they believe that the email
field is also visible to other users. Currently, using Incognito mode
or going over the Settings is the only "reasonable" way to verify this
from the perspective of the user.
A locked padlock should be enough to indicate that the email is not
visible to anyone apart from the user and the admins. An unlocked
padlock is used if the email address is only shown to authenticated
users.
Some additional string-related changes in the Settings were introduced
as well to ensure consistency, and the comments in the relevant tests
were improved so as to allow for easier modifications in the future.
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#### Screenshot (EDIT: Scroll down for more up-to-date screenshots)
***Please remove this section before merging.***

This lock should only appear if the email address is explicitly hidden
using the `Hide Email Address` setting. The change was originally tested
on top of and designed for the Forgejo fork, but I don't expect any
problems to arise from this and I don't think that a
documentation-related change is strictly necessary.
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Co-authored-by: silverwind <me@silverwind.io>