RSS String formating

I’m trying to use the Feed binding to have the latest news’ title on my sitemap.
The only problem is encoding as diacritics show as �. I use UFT-8 on all my strings, but don’t now how to do it on a RSS Feed string:
My item:
String latest_title {channel="feed:feed:c057385c:latest-title"}

My log:
2018-12-23 13:10:36.901 [vent.ItemStateChangedEvent] - latest_title changed from NULL to Umtiti vai prosseguir recupera��o ao joelho sem opera��o

Thank you