The problem is still there. I'm running the latest app on my iPad. I am able to tap into the Title field and then back into the body of the note to get spell checking working. I don't think the evernote team gives a sh*t about this given how long this bug has been out there.
When using my bluetooth zagg keyboard with the iPad, I can only get spellchecking (red underline of mispelled words) to work as follows: When you open the note for editing, click in the "Title" field first. Then click back to the body of the note. Mispelled words will be underlined. However, when switching to a different app on the iPad and then switching back to Evernote, you will need to again click in the "Title" field to reenable spellchecking.