When I use loadFont function, bitmap font file and default Processing rendering (in window), Cyrillic text is shown correctly. 

When I switch to PDF mode which requires createFont instead, only latin characters are rendered.

Code sample:

1. import processing.pdf.*;
2. PFont cyrFont;
3. 
   
4. void setup() {
5.   cyrFont = createFont("Tahoma", 14);
6.   size(300, 300, PDF, "cyr.pdf");
7.   textFont(cyrFont, 14);
8.   text("This is regular text", 50, 50);
9.   text("This isn't: «кириллица»", 50, 150);  
10.   text("This isn't: «\u00f1\u0410»", 50, 250);  
11.   exit();
12. }