For example, try downloading any French documentation from <http://lilypond.org/doc/v2.19/Documentation/web/notation.fr.html> if your browser locale is not French. Possibly even if it is.
I am currently setting up the size listings to correspond with the actual files linked there, but the actual files apparently are incorrect all too often. I've not yet discovered a coherent strategy in the various translations how they attempt to, by and large, get a hold of downloads in their own language. The download details pages are where the sizes are currently given (the others are without size currently as far as I can tell: it should not be too much work to reorganise size indications once I am finished, to get more of them). -- David Kastrup