How many points?
Two cultures with four results:A or B or both or neither.
One can only communicate in one culture,A or B.
If one communicates in A with anything from B,that is the barrier.
If one communicates in B with anything from A,that is the barrier.
There is no intercultural anything,but only monocultural anything.
If one from culture A lives in culture B,one has to become a person living in culture B to communicate without barriers.
It all depends whether one wants to be an A-culture person,or a B-culture person.
It is extremely difficult to be both.
Conclusion.