Its appear to be language support issue.
What do you see when you run it on Android or iPhone emulators?
It is possible that the encoding of your .erb file cannot handle extended characters. Within RhoStudio, right click your .erb file and click "Properties". Check where it says "Text file encoding", if it says anything other than "UTF-8", change it, make any change to the file, save it and try again. If that works for you, do the same for your project's top-level folder so that new files are created in UTF-8 by default.