Google’s Gary Illyes have posted on Twitter tip about Google’s manual spam reconsideration requests that if your website is in French and you get a manual action notice, write your reconsideration request in French too. Don’t write it in English or a different language, write it in the language of your website.
He actually wrote, “TIL: Writing a reconsideration request in English if the site is not English is a brilliant way to shoot yourself in the foot.”
This Idea can give the power of those webmasters who are affected by Google Manual spam penalty.