Rails titlecase doesn't work on non-english letters

I'm trying to use title开发者_开发百科case to change an all uppercase words to nicer output. It works with non english letters but not on other letters. Is there any similar more UTF-8 friendly command?

"#{self.name.titlecase}"

Results:  SkjÖldÓlfsstaÐi

Johann

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This should work on unicode characters:

"SkjÖldÓlfsstaÐi".mb_chars.titlecase.to_s

Results: Skjöldólfsstaði