First, extend your audience to an English speaking one. It makes sense if you want to reach more people. You can always add an option between Turkish and English on the blog. That said, I would make English the primary language.
Second, you only get popular by posting great content frequently. Content is king, as they say. Worry less about a trivial number of readers and focus more on creating quality content first and foremost. Then once you have readers, you'll be able to give them a reason to come back for more.
Third, find where your desired audience already is and promote your content to those people. This can be on forums, other blogs, or whatever other communities you can find that are relevant. Your goal is to get your content in front of those people without shoving it down their throats. If your content helps people that shouldn't be a problem.
Source: I run two blogs with 100k monthly visitors between them.