I'm sorry, i thought responses would go to my email. I'm using arial as standard font. I have already seen the other post and it didn't work

I'm brazilian and I'm having a problem that looks like this http://imgur.com/a/WTnvc
There is an extension that kind of solves the problem, but I don't like it very much.
I already tried to change the font on opera settings but it didn't work.
Can anyone please help me, this is very annoing.