OneNote FindPages API do not support other language like Chinese

[MarkLeiSource]

I am developing a tool for searching key words in notebooks and record the relationship between key words and search result for OneNote Client by Interop COM API. However, I'm facing a problem that when I use the FindPages API of application object like:

var app = new OneNote.Application();
app.FindPages("", "中文", out resultXML, false, false, OneNote.XMLSchema.xsCurrent);

I got no result for 'resultXML' ,seems this API only support the UI language for OneNote. Is there any workaround that I could get correct 'resultXML' by other language key words ? I tried install Chinese Language Pack for Office Client, it could solve the problem, but I need a better way without language package installation. Thanks.