  It is reasonable to hypothesize that the divergence patterns formulated by
historical linguists and typologists reflect constraints on human languages,
and are thus consistent with Second Language Acquisition (SLA) in a certain
way. In this paper, we validate this hypothesis on ten Indo-European languages.
We formalize the delexicalized transfer as interpretable tree-to-string and
tree-to-tree patterns which can be automatically induced from web data by
applying neural syntactic parsing and grammar induction technologies. This
allows us to quantitatively probe cross-linguistic transfer and extend
inquiries of SLA. We extend existing works which utilize mixed features and
support the agreement between delexicalized cross-linguistic transfer and the
phylogenetic structure resulting from the historical-comparative paradigm.
