Scala play project does not support special characters

I am using scala with play framework app on server, on the server some characters like ( Šlast Ülast Ölast)
getting displayed as (?last ?last ?last).

How can I make them properly work on server?

Being displayed where? How are you displaying the Strings? Play supports full Unicode, but it sounds like you might be using a library or function call that doesn’t.

(Also: which version of Play?)