In the end it's content that matters, not the form that it's send to - I don't care if it's my grandma sending me offers for viagra pills, or a spammer, and I don't care about the language either - I just don't want to get such offers.
On the other hand, if there is an e-mail that may be interesting to me, I don't care if it was sent by a human, or by a machine - I want to see it in my inbox.
In other words - it's not about distinguishing human/machine written text. It's about distinguishing content that is worthwhile for me from the one that isn't.
In the end it's content that matters, not the form that it's send to - I don't care if it's my grandma sending me offers for viagra pills, or a spammer, and I don't care about the language either - I just don't want to get such offers.
On the other hand, if there is an e-mail that may be interesting to me, I don't care if it was sent by a human, or by a machine - I want to see it in my inbox.
In other words - it's not about distinguishing human/machine written text. It's about distinguishing content that is worthwhile for me from the one that isn't.