Trouble with accented characters

I have the same problem too.

The issue that you are facing may due to the “Bitter” font which we used doesn’t support your language.
Please try to replace with a different font below:
Firstly, find the font here: http://www.google.com/fonts/

Secondly, open template.css file , then find “Bitter” font and replace with your font as you want.
@import “http://fonts.googleapis.com/css?family=Bitter”

.entry-title {
font-family: 'Bitter', serif;
}

and you need to find the class that you want to rename your font .

Example:

@import “http://fonts.googleapis.com/css?family=Noto+Sans”

.entry-title {
font-family: 'Noto+Sans', serif;
}

I wish you success.

Regards,
Dominic