If you want to reach people who speak other languages, you could use the language setting. It is default in English since this is an English Google Ad account. You could select multiple languages.
For example, if I want to promote my Chinese blog in the United States, I definitely will target users who can speak and read Chinese.
If someone in the U.S. and his Google interface setting is Chinese, my ad will be eligible to show.
However, if a Chinese speaking person is searching on Google in Chinese, but his settings have defaulted to English, then my ad will not show if I only target Chinese speaking people.
Therefore, it is important to include English with other languages together in your setting.