Aspose.Pdf.Form 1.1.4 has provided the following new feature:
Fill the field with a unicode string and display it with the user’s font. (The user should choose the field’s font correctly when the field is created.) Please download the hotfix from http://www.aspose.com/Downloads/Aspose.Pdf.Form/Default.aspx
About the unicode field value support, please read this post http://www.aspose.com/forums/AddPost.aspx?PostID=18033.