Welcome to the forum, bugsbunny14!
Let's see:
1) Yes, it reads TXT, PDF and RTF files without conversion.
2) That one we don't know about yet, I assume that the larger the file the slower it will load, but how long that will take ....
3) If it's a PDF file, I'd assume that it doesn't matter what lanquage it's in, the fonts sould be embedded, so it should work fine.
For PDF's in general, you'll of course get best results if the file is formatted for the size of the Reader's screen.
You may find the
Sony Q&A thread useful.
