Mainly used to end main clauses to form direct (yes/no) questions (e.g. tu le suki in ne ka? 'Do you like this?'), or lone subordinate clauses to form indirect (whether/if) questions (e.g. ta ja le lo ka(,) le no sankan 'Whether they go (or not) is not important')
Incompatible with relative clauses
Changes main clauses into questions (essentially a spoken question mark)