dialect island

(dialectology) An enclave where a dialect is physically isolated from similar dialects.

Japanese Meaning

類似する方言と物理的に連続性がなく、独自の方言が維持される地域。

The mountain village remained a dialect island, preserving an archaic pronunciation unknown in surrounding towns.

その山村は方言の孤立地域のままで、周辺の町では聞かれない古い発音を保っていた。

Sense（1）

(dialectology) An enclave where a dialect is physically isolated from similar dialects.

dialect islands

（ plural ）