The spellchecker was removed from TinyMCE and CKeditor for the 188.8.131.52 release (I think, possibly it was the 184.108.40.206 release) before we took over the project.
We feel including a spellchecker in the editors isn't entirely necessary as Chrome, Firefox and Edge all include spellcheckers already.
So, if you want the editor spellchecker, you can include it yourself (as you have done).
Thank you for continuing to use mojoPortal.
Hope this helps,