Not working properly in Portuguese

I have tried the following code, but it doesn’t work. Using a simple term, like ”Brasil”, it did work, but not for this other one. Can you help? What am I missing? Thanks guys, great plugin nonetheless.

[wikipopup lang=”pt” title=”Tratado da Antartida”]Tratado da Antártida[/wikipopup]

Also, any customization option on your outlook? Just so we can match it better to our layout.

Thank you very much!