BuddyPress.org

hi, i have installed WP+BP+BBPress. Everything works, i have no bad words, but when i create a new forum post in group in my native language (lithuanian) forum or buddypress don’t understand my language simbols for example:

i write these letters ąčęėįšųž and i get “?” everywhere i write my language letters. What can i do ? i think somewhere need to change coding…Pls help me. What i say can be seen going to this page a look at new group post that i did

http://www.shouty.lt

Thank you for help.