I am a STNA instructor in Ohio and I would offer you a couple of suggestions:
1. First I would google Nurse Aide testing, there are many sample tests that are free, take as many as you can.
2. I highly suggest taking the oral test instead of the written. Better yet ask your instructor to put in for a reader-marker.
3. Go over every med term in the back of your red book from D&S. Make sure you understand what they all mean.
goodluck! language barriers can be difficult, but if you did good in your class, you should do fine. Let us know.