problem with spell-check buffer

I was trying to spell-check the buffer with some selected dictionary:
```
ispell-init-process: Error: The file "/usr/lib/aspell-0.60/american" can not be opened for reading.
```

Start by reproducing the spell-check failure with a selected dictionary and inspect how the buffer's spell-check process resolves the dictionary path. The issue names no files or tests; done means the selected dictionary can be opened and spell-checking works without the reported error.

Written by the indexing model from the issue text.