When you edit a text field, you can pull down the format menu and apply font and text styles directly to the selected text in your field. The change will apply only to the text in that field.
This will work as long as no one has set an auto-enter option to automatically strip out the text formatting.
Your suggestion led me to the solution: In Layout mode I used the Format-text option to set all the field formatting elements including foreign font. I guess I was having a mental block against selecting non-Roman fonts!