The noun phrases a shared code of symbols for communication ...

a code for the communication of shared symbols.

the people who live in the North of Spain.

a code for sharing the symbols in communication.

the Basque spoken in the North of Spain.

a communication of symbols shared in a code.

the Basque spoken in parts of Northern of Spain.

a code of symbols shared for communication.

the regions in the North of Spain where Basque is spoken.