If increased migration breaks down a dialect continuum where isoglosses previously clustered, which consequence affects mutual intelligibility?

💡 Explanation

Isogloss bundles represent sharp dialect boundaries; however, increased migration causes them to spread out spatially, because dialect features mix more freely over a wider area, weakening the previously clear boundaries. Therefore, isogloss bundles diffuse into gradients, rather than remaining sharp distinctions or causing rapid convergence.

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