Xan just recently blogged about spell-checking coming back in Epiphany:
    http://blogs.gnome.org/xan/2011/06/18/its-all-in-the-small-things/

In a comment, he said:
> "To everyone commenting about spellchecking features: yeah, we likely need a few more things built-in by default, others perhaps as extensions. Let’s start opening bugs and (ideally!) sending patches"

So here is the bug report (without patch unfortunately :( )

If the screenshot is accurate, Epiphany doesn't handle multiple languages very well:
    http://blogs.gnome.org/xan/files/2011/06/twitter2.png

Nowadays, more and more people write in at least two languages on the Internet: their own language, and English. So it seems very important to check spelling in multiple languages.

One possibility which works nicely is to present it like Evolution does:
    http://bochecha.fedorapeople.org/tmp/evolution_spell_checking.png

Spelling would be checked in all enabled languages, and suggestions grouped by language as shown on the screenshot above.

There are probably other ways to o it, but this one would at least be consistent with another Gnome software (and might even deserve its own Gtk widget perhaps?)