Second Language
From TEFL World Wiki
When a student learns English in order to live in an English speaking country we say they are learning English as a Second Langauge. Second, in that their First Language is their Mother Tongue.
Compare this with Foreign Language.
Both can be termed the Target Language or sometimes L2 (as oppose to L1 which is the MT)
The process by which a second language is learnt is referred to as SLA or Second Language Acquisition.
