I don't understand what you mean. Now I'm using these lines:
load_std_font("PR.ttf", assets, files);
fontfileListAdd(act.getFilesDir().getAbsolutePath() + "/PR.ttf");
setDefaultFont(null, "Palatino-Roman", true);
Like you suggested in two previous comments.
Can you provide a complete example not by scratches? If this code is ok then it seems like I'm using wrong font.