the second language is the language that one learns after ones native language,whereas target the language is the language of translation,situation or sitting in which reader needs to ude the language.

A native language is the language that a person learns from birth or is spoken in their home country, while a target language is a language a person is learning or aiming to master. Native language is typically the first language a person speaks fluently, while the target language is a second or additional language being acquired.

it is finding the meaning relationship words in target language and source language

Massive amounts of time spent listening and reading to the target language.

A source language is the original language in an interpretation. For example, if I speak a phrase in English and it is translated into Spanish, the Source language is English. The target language is Spanish.