Document that you might get wrong suggestions if you use a custom system that overlays onto an existing one

[42triangles]

The suggestion window actually feeds everything back through all dictionaries to figure out what might be "shadowed" by other dictionaries. As such, you cannot rely on suggestions working correctly if you use a custom overlay system, since on of your suggestions might actually be shadowed, but it'll not be shown as such. (as in, it will still be displayed)

That said, this shouldn't be that big of a deal anyway.

This will not impact other dictionaries being shadowed (both wrongly and correctly), since the parsing disables the overlay anyway.