mutually intelligible

Adjective

not-comparable

(linguistics) Of two or more speech varieties, able to be understood by one another's speakers.

Japanese Meaning

（言語学）複数の言語や方言が相互に理解できる状態。すなわち、話者がお互いの言語を理解できること。

Although Spanish and Portuguese are distinct languages, they remain mutually intelligible for many speakers.

スペイン語とポルトガル語は別々の言語ですが、多くの話者にとって互いに理解できるままです。

Sense（1）

(linguistics) Of two or more speech varieties, able to be understood by one another's speakers.

This language, or mutually intelligible forms of it, is spoken by the coast-dwellers over an extensive area