We are building medical software, our customers are using IE, so please add an integrated spellchecker in Kendo.

I've had some success getting an open source spellchecker to work with the Kendo Editor under .Net MVC.

check out https://github.com/AnthonyTerra/ASP.MVC-Jquery-Spellchecker

This is itself based on a php spellchecker project so PHP users might find they can get it working with the original jQuery spellchecker project.
https://github.com/badsyntax/jquery-spellchecker

I've resurrected this topic on the advice of Todd Anglin.  Please head over to http://uservoice.com/a/TwNCh and give it your votes

Definitely it needs to be included as still lot of our government clients are on old computers and Operating systems running age old browsers, we still want to support them.

Why can't you guys include something like http://www.aspnetspell.com/Main_Page

We love the kendo ui suite and have been using in all of our new developments and would love to see support for spell checker.
 

+1, this needs to be re-activated. As per Geoff Ables' comment above, the vast, vast majority of our customers are on pre-ie10 and this is stopping us from adopting kendo in place of TinyMCE (which has a LGPL license and presents a legal risk)

I also would like to see this idea re-activated. We have many customers still using IE8 and IE9. And there's also the problem of custom dictionaries and languages that the spell check of the browser might not support.

Can I add my voice to this? Not only do we too need spell check on pre-IE10 but we need a centralised custom dictionary and the ability to switch spell-check on/off for particular input fields

I would like to see this idea re-activated.  Although modern browsers include spell check, many large businesses require using IE and they are slow to upgrade to a modern version.  For this reason, there will be millions of business users on pre-IE10 browsers for another 3-5 years.  Adding spell check (as is in the Telerik Silverlight RTE control) will be an important differentiator to these companies.

This is the only thing preventing me from using the kendo ui editor, we need to be able to have a custom shared dictionary, and we need to include forced spell checking in the client side validation process.

There is a strong case to add spell check. For e.g. if you are developing an application that have sensitive data than you don't want to use browser spell check and develop your own solution that will do a spell check against your custom dictionary using NHunSpell.  For health care and finance industry this the must. This may be deal breaker for me to use kendo UI.