If you would like English-speaking commenters and readers on your blog, please be careful about the service that you use. (Especially if you would like commenters who don’t speak your language!) I just tried to leave a comment on an English-learner’s blog. The blog is on Livedoor. My comment was rejected (it was not accepted and would not be posted). I was really surprised because I had entered a username and e-mail address. I thought I had done it correctly, but I got an error message in Japanese.
If you got that error message and you couldn’t read Japanese, you would give up, right? I tried to read the message, but it was pretty difficult. Finally, I realized that the blog’s settings automatically rejected any comment that did not have Japanese in it. If you write a comment in English, your comment will not be posted. The blog owner will never see it. Oops! I guess that’s a kind of spam control system. But it doesn’t work if a blogger is writing in English and would like people to answer in English.
There are usually also problems with things like “Comment” “Name: ” “E-mail: ” “Submit” and so on not being in English. That would make it really hard for English-speaking commenters to use.
Some blogging services let you control those settings. In that case, you can change it and it may be OK. Other blogging services don’t even tell you about those settings, so you can’t change them. (That’s too common–I commented on an English teacher’s blog once. His blog had a setting that limited comments to a very short length, so my comment was rejected. He didn’t know about the setting! Finally, he was able to find it and change it. But sometimes you don’t have a choice.)
So that’s why I recommend using Posterous, WordPress, Blogger, WordPress or Movable Type installed on your webhost, etc. You can probably find a guide to the blogging service in your language to help you. (If you have to use the blogging service in English, you’ll learn a lot of useful technology vocabulary.)
Of course, if your blog is basically a journal or diary for yourself, it doesn’t matter. In that case, you don’t even need comments. But many learners discover that they are more motivated, write more often, and write better if they feel like they have readers. (For example, on WordPress.com, even if people don’t have time to comment, you can see that you have readers.)
Again, if you decide to blog a) good luck! and b) tell me about it so I can read it!