Message box prompt action not displaying in chinese language

I have attached a screen shot of the error what I'm facing in Chinese language.

i have used

pip_ns.changePIPDocStatus = function()

{

jQuery.sap.require("sap.ui.commons.MessageBox");

sap.ui.commons.MessageBox.show(

myPathContext.i18nModel.getProperty("CONFIRM_ACTION"),

sap.ui.commons.MessageBox.Icon.WARNING,

"",

[sap.ui.commons.MessageBox.Action.YES, sap.ui.commons.MessageBox.Action.NO ],

pip_ns.fnCallbackMessageBoxpop1,

sap.ui.commons.MessageBox.Action.YES);

hideBusy()

},

in the prompt the YES OR NO button language is change for Spanish,French and portuguese but not in chinese when i change to chinese language the yes or no is displaying in english language,please help on the issue