For me it is clear that one does not become a worse English speaker in a few years, if anything the opposite, you can see people on the forum whose posts years ago were written with poor English, but over time they have improved because they have learned more English or use tools like automatic translators, which today are very reliable.
These are exact words of The Sceptical Chymist, he hates it when once a good English user deteriorates and then gives silly excuses like travelling as the reason for the progressive worsening of English .
No, this particular case has not been reported. But I had a similar case earlier from the Pakistan section. Also plagiarized. I reported it in the moderators section, but there was no response to my request, even though I gave the example of two cases of plagiarism. So I saw no point in filing an application against this user, as it would likely be ignored as well.
Could it be that moderators are becoming more lenient in decision making these days. Maybe theymos had issued an information/advice on this after it was discovered that he invalidated reports that are 6 months old.
You can also give me two positive trust for distributing to all members honestly
It would have been nice that you didn't appear here, than appearing without a cogent defence to the allegations against you.