I use IGuestBlog for my monthly orders and send through a range of industries for them to work on. They always come back on a decent site with a natural link inclusion. Nothing looks like it's from a site list, there are genuine sites with actual readers and traffic. They never give me any hassle and deliver my orders on time each month. They also tackle my casino orders which a lot of companies won't touch. I haven't tried them for different languages but think they do language content too.