Spellcheck necessary for user generated content?

[lcourse]

We have a lot of user generated reviews on our key landing pages.

Matt Cutts recommended using correctly spelled content.

Would you perform a spellcheck of all already published user reviews or would you leave already published reviews rather intact and only perform spellcheck for new reviews before they are published?

Since reviews have been marked up using schema.org, I am not sure whether posterior editing of lots of reviews may raise a flag with google regarding manipulating reviews.

Thanks.

[EGOL]

Sum ppl tink dat a rebiew wit a lota misshpeluns kan be a qality hint. So too edet will make it wortless.

I don't think that reviews should be spell checked or edited.  I think that they should be posted "as written" by the author.  The quality of the writing is, in my opinion, an important part of the review.  It can be used as a measure of credibility.

If you get an email with a lot of grammar and spelling problems it can be a sign that it is spam.  I think that the same applies to reviews.

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As for Matt Cutts.... I think that he is referring to article content where the author should be taking some care.

Reviews, forum posts and blog comments are going to have spelling and grammar problems everywhere.

[Textbroker]

I agree with EGOL that you shouldn't edit someone's existing review or post. I would offer a spell-check option within the review editor on your site and encourage your reviewers to use it.

[lcourse]

Christina, excellent idea integrating spellcheck upon submission. Will have a look at google spellcheck API. Thanks.

[lcourse]

Very good point relating to credibility of review and great relief  that I do not have to perform spellchecks of thousands of reviews. Thanks.

Still may follow also Cristinas suggestions as poor spelling in user review may also reflect on visitors perception of website's credibility.