target language
noun
1.
the language into which a text is to be translated from another language.
Compare
source language
(def 1).
2.
a language, especially a foreign language, that one is in the process of learning.
Compare
source language
(def 2).
Origin
1950-55
British Dictionary definitions for
target language
target language
noun
1.
the language into which a text, document, etc, is translated
2.
a language that is being or is to be learnt