As long as communicative needs differ from one district to another, complete linguistic homogeneity cannot exist […] Once the familiar and comfortable idea of the homogeneity of linguistic community is abandoned, the world appears as an ocean of conflicting attractions, convergence here breeding divergence there, with new centres of attraction developing at all times and threatening to disrupt existing ensembles. And this is true on all levels, national, provincial, local, and familiar.
- Martinet (1962), a pag.105