Many thanks everyone for your replies and roughly, that's also what I had expected to be the outcome.
Neutral trust after the first offense to prevent users from sending Merit to that user is also a good idea, especially if that user tries various languages with his fake translations.
How come someone merit a post like this?
Well, we had a case recently where that happened but only a single Merit was sent.
Merit sources are well aware, that such cases can happen and are always reading posts carefully. Depending on the translation tool, especially inexperienced users can fall for this.
Using a translator to get merits just because your post quality is so low no one actually likes reading your posts, does not mean that trading with this person is high-risk.
IMO a neutral one definitely would be accurate, but a negative one seems to be a bit too harsh.
But it is blatant Merit abuse gaming the initial purpose why Merit was created: deliever meaningful / interesting / educating content to increase the post quality and prevent spammers / account farmers from ranking op. Just pasting some already written content into Google Translate and spam it to a foreign local board is a slap in the face to everyone else who earns Merit with effort. Especially for the person whose topic got abused.
That's in fact Merit abuse.
picking good guides from other users / websites, pasting them into Google Translate and publishing them at local boards
If they are stealing/plagiarizing others material, then no warning neg trust. Why treat them any different then anyone else who plagiarizes?
I don't know if that's really plagiarism according to the rules. They post a reference link to the original topic and pretend it's an official translation, brought from the international to a local board. But not a legit translation, just simply copy pasted via Google Translate in a language that the user doesn't know and never posted in before.
I agree, it's indirect "stealing" of content but not sure if plagiarism can be applied here. For such grey areas, Trust seems to be a better tool.
When that happens, maybe there could be a centralized topic in which people could report from the local board on what they are doing.
We have already such a topic for Bounty translation abuse (
Übersetzungs-Spam gefunden? Hier könnt ihr ihn berichten) and there I'm also giving out some warnings first and taking action on how the user reacts. It's working very well.