Absolutely nothing in this thread works for me except Joe's ampersand codes and some of the high-bit characters in DaveRo's Turkish text. When I want to post Turkish or Hungarian I use ampersand numeric codes, they do work here.

for Turkish:

& # 1 9 9 ; Ç
& # 2 3 1 ; ç
& # 2 8 6 ; Ğ
& # 2 8 7 ; ğ
& # 3 0 4 ; İ
& # 3 0 5 ; ı
& # 2 1 4 ; Ö
& # 2 4 6 ; ö
& # 3 5 0 ; Ş
& # 3 5 1 ; ş
& # 2 2 0 ; Ü
& # 2 5 2 ; ü

and Hungarian:

& # 3 3 7 ; ő
& # 3 3 6 ; Ő
& # 3 6 9 ; ű
& # 3 6 8 ; Ű

The other non-ASCII characters in Turkish and Hungarian can be done with alphabetic ampersand codes (which are not too hard to remember).