I have a similar problem of Word 2016 crashes when using SpellCheck on two specific sentences, I found a similar problem reported in Word 2013 that was caused by the file OSF.dll. One fix then, was to rename or remove the OFS.dll file.
I had already reinstalled Word 2016 (32bit) on my Windows (64bit) system which did not correct this problem. So, I went to C:\Program Files (x86)\Microsoft Office\root\Office 16\OSF.dll and renamed it XOSF.dll. I then rebooted my system and tested Word 2016
SpellCheck on the two examples I have that trigger a crash. During SpellCheck, Word waited a long time saying (not-responding) and then it came back and corrected the misspelled word without any error.
Apparently, OSF.dll is somehow involved with this failure. I don’t like the long (not-responding) delay, but it does seem to eliminate the crashes. Does anyone have any knowledge about the possibility that Microsoft has identified this problem within Word 2016
and possibly issued a corrected OFS.dll file?
Spike