sesquilingualism means the condition of being sesquilingual; the ability to speak one language fluently, and a second language only to a limited extent. Lexicurio rates it Rare gem — a strength score of 82 out of 100.
noun
- The condition of being sesquilingual; the ability to speak one language fluently, and a second language only to a limited extent.“The transitional zone can be regarded as the dialect boundary, where the two different dialects meet but there is no significant gap in mutual intelligibility due to the sesquilingualism of the native speakers.”