There seems to be a spell checker issue in Word where the following error is reported.
On my Mac, this happens most often when I open a file that did not originate from MS Word 2011. If I create a document in MS Word 2011, and leave spell and grammar checks enabled for “as you type” (see below on how to disable this), then I do not get an error.
If you do not disable the options below, then as at the date of this page this error will recur and you will need to shut down the application (force quit).
Disable the ‘as you type’ options
First, in Word select Word >> Preferences and the following window will appear.
Select ‘Spelling and Grammer’
Next, deselect “check spelling as you type” and “check grammar as you type” options (see image below).
Once this is done you should be able to open the document that originated in OpenOffice or any other compatible programme without the pop up warning appearing.
Please note, however, that this pop-up will re-occur if you do a spelling and/or grammar check.
“Repair” a Document
If you want to be able to re-enable the ‘as you type’ options above, you may want to try the steps below, as these have worked for me. However this does not assist with compatibility of Word documents between OpenOffice.org and MS Office.
First, save the document as a docx file.
Then select all the text in the document (Command-A).
Next select Tools >> Language, and select one language for the entire document.
Save the document.
To test if this has worked, try performing a spell check. If that executes successfully, then you can turn on the ‘as you type’ features.
Please note, however, if you open any other documents that didn’t originate in Word 2011, then you may have to perform all the above steps again.
Good luck and I hope this solves some issues.