I skimmed the readme but a chunk of it is admittedly over my head, however I would expect something based on letter frequency and n-grams to work regardless of layout, while something that relies on the acoustics of the individual keys to be layout-dependent.

Based on the readme it seems to need training data, so assuming you train it with the same layout you want to use later to capture from. i don't see why it wouldn't work.

from the web-page:

    It does not require training data - instead it uses statistical information about the frequencies of the letters and n-grams in the English language.

and from this it should also be noted that it won't apparently be able to extract passwords, as least those which aren't "n-grams in the English language".

This would be a good argument against the xkcd philosophy towards passwords.

Unless when typing your password you deliberately use different fingers than you would when typing normally