Spell Check issue

I use Open Office and have had the dictionary stop working.  Spell check highlights every word, ie  it, and, the.I have used this product for years without issue.  If an extension is required, please explain what an extension is as I do not have the computer expertise to know what they are and

dictionary

I use Open Office and have had the dictionary stop working.  Spell check highlights every word, ie  it, and, the.I have used this product for years without issue.  If an extension is required, please explain what an extension is as I do not have the computer expertise to know what they are and