I think this might be a good point.

For reference I'll take some time and dig up how prevalent aspell dependencies are. However, I can see that it might fall outside the core functionality of graphics, so someone doing a bare-bones compile might not want it. If it were a configure option and had #else stuff to indicate a feature was not compiled in (like the lcms stuff) that could be handy.

But for main releases I imagine that most will want the feature.