转换的属性文件有一个语言扩展名。

The translated properties file has a language extension.

youdao

但没有一个技巧：如果您的文件扩展名，可以将转换为小写，同时保持全部大写的基名称扩展。

There was a trick, though: If your file had an extension, you could convert the extension to lowercase while keeping the base name all uppercase.

youdao