The point in bibliography and multiple alphabets

I have few troubles with a style. Our style has some specifications. We need to remove the point after we replace author by dashes. It will be very nice if this future works automatically.

The problem is also when i choose to sort in order books from the same author with the same year it goes like this: 2000a, 2000b, 2000c, 2000d…  We use our alphabet so i need to correct all the letters manually for all the books. I need to include also letters like č, š, ž etc. If i could choose sorting with different alphabets by country it will help a lot. For example without the point and with letters:

 Rowling, J. K. in Mary GrandPré. 1999a. Harry Potter and the Chamber of Secrets. New York: Arthur A. Levine Books.
— 1999b. Harry Potter and the prisoner of Azkaban. New York: Arthur A. Levine Books.

— 1999c. Harry Potter and the prisoner of Azkaban. New York: Arthur A. Levine Books.

— 1999č. Harry Potter and the prisoner of Azkaban. New York: Arthur A. Levine Books.

Hope that this suggestions helps. 

Please make an update.

thanks for share :stuck_out_tongue: