Not really.
I believe you meant "Yesterday, you made very few grammar mistakes while talking, if any."
or "Yesterday, you made very few grammar mistakes while talking, almost none."
Hope this helps!
2017年1月16日
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Yesterday, you made very few grammar mistakes while talking, HARDLY any.
Yesterday, you made very few grammar mistakes while talking, almost NONE.
Both of these essentially translate as "casi ningún error" in this case.
2017年1月16日
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Almost correct! Just change one word.
I think you mean to say:
Yesterday, you made very few grammar mistakes while talking, almost none.
2017年1月16日
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Accidentally posted here instead of in the answers. Moving my comment....