Support locale language ?

[https://maxmind.github.io/GeoIP2-java/](https://maxmind.github.io/GeoIP2-java/) doc:
```
    System.out.println(country.getName());               // 'United States'
    System.out.println(country.getNames().get("zh-CN")); // '美国'
```
How to get another language output like `zh-CN` ?