Hi ryumaster,
That`s right we are not reading unicode files at this moment.
The read functions reads bytes, and the readLine function reads bytes as asciis. For utf-16 files, you need to read two bytes to get a character.
This could be an interesting feature: adding support for reading unicode text files. I will bring the issue in the next GledPlay development team meeting. Meanwhile you can add your idea in the wishlist post.