Kriol-derived prepositions only occur rarely in Gurindji Kriol, and often in conjunction with a Gurindji-derived case marker, creating a double-marked structure. Gurindji Kriol only uses two prepositions - langa, which is used to mark topological relations and goals, and bo, which is a dative preposition used to mark indirect objects, animate goals, purposive and benefactive constructions.
Source: Meakins 2011: 376
Source: Meakins 2011: 380