I am currently testing this method with one of my old domain's, I will add 150 new articles a day relating to my niche. 150 articles will take around 2 hours. I will be tracking it using plug-in's on wordpress and after 1 week I will submit all my pages to indexkings (I'm only submitting it to indexkings as purely just a test before I submit my legitimate websites.)
Before even attempting to monetize the website I'm going to wait one or two months to see how my site fairs with gaining visitors and if it seems acceptable I will place amazon products on it relating to my niche and have them rotate every 8 seconds or so, or if that is not a viable option I will place adsense on their.
I will report back at the end of week 2 with how it's all going! And if things are moving in the right direction with a positive increase in unique visits, i might create another three sub-domain relating to a different niche and spend 30 minutes a day on each posting content.
One tip I do have is to before you start go to google and find around 250 websites with a lot of blog posts relating to your niche and paste them into a file, then when you start copying and translating just start from the top blog and use that until its exhausted, then delete it from the list and move on! It will help you with reducing duplicate content on your blog and keep you motivated when you start seeing the list go down and will save time from finding new articles.
If anyone has any more updates of traffic they are receiving to their blogs please let me know!
If your stuck on what language to choose when starting this, here are some hopefully up-to date stats on the most spoken languages:
[TABLE="class: wikitable sortable jquery-tablesorter"]
[TR]
[TH="class: headerSort, bgcolor: #F2F2F2, align: center"]Language[/TH]
[TH="class: headerSort, bgcolor: #F2F2F2, align: center"]Percent of World Population[/TH]
[/TR]
[TR]
[TD]Mandarin[/TD]
[TD]12.44%[/TD]
[/TR]
[TR]
[TD]Spanish[/TD]
[TD]4.85%[/TD]
[/TR]
[TR]
[TD]English[/TD]
[TD]4.83%[/TD]
[/TR]
[TR]
[TD]Arabic[/TD]
[TD]3.25%[/TD]
[/TR]
[TR]
[TD]Hindi[/TD]
[TD]2.68%[/TD]
[/TR]
[TR]
[TD]Bengali[/TD]
[TD]2.66%[/TD]
[/TR]
[TR]
[TD]Portuguese[/TD]
[TD]2.62%[/TD]
[/TR]
[TR]
[TD]Russian[/TD]
[TD]2.12%[/TD]
[/TR]
[TR]
[TD]Japanese[/TD]
[TD]1.80%[/TD]
[/TR]
[TR]
[TD]German[/TD]
[TD]1.33%[/TD]
[/TR]
[/TABLE]
(Stats taken straight from Wikipedia, and yes I know a good 90% of information is opinion on Wikipedia)
edit: I should also point out that I am also translating the blog post titles into my chosen language. The reason I am doing this is because the blogs that I am translating from are run by many different bloggers but all on one site, and if they decide to Google their own topic title and my website pops up then suspicions will be raised. The way i see it is that from reading the whole of this thread and all replies that we are not concerned about ranking for keywords and having the title in English will not matter greatly other than if the title is translated badly and then no-one will visit it. But the positives of pretty much eliminating the chances of being caught plagiarizing peoples work with the chance of more pages receiving less views greatly appeals to me, and I would actually advise people who have concerns over plagiarism issues to simply translate the whole of the blog post.
Another tip: When translating titles from English into your chosen language (mine is Spanish), copy your English title into the translator, then translate it back into English! Sometimes you will have to the change words, but I may be wrong and do hope someone will correct me, but it will help the title make more sense in your language and thus gain more hits! Or you could just reword the title in English