Copyright matter

I have a question for the GNU legal department:

If we would let XBoard display a logo bitmap that contains text in a 
font that we do not own, but are licensed to use... Would that be allowed:

What if it was not a logo, but the piece images? Shogi and Xiangqi 
pieces have text inscribed on them as kanji. The kanji originally came 
from a font, which might not be public domain.

The practical problem is this: Joshua has made SVG Shogi pieces that 
look better than those we distribute now, and is willing to let us 
distribute them with XBoard. The pieces were made by tracing raster 
images of a font that was posted somewhere for free use.

Can we do that?