I've been doing blog commenting for a website I have in spanish. It works great with spanish blogs but I've started to blog commenting also on english blogs. Do you think it will work as any backlink? I'm not doing this to getdirect traffic, but to grow up on SERPS with more and more backlinks. Do you think Google will consider these links, even when english blogs havent the same languague of my site? The comments I posted are written in english. What do you think about this technique?