UG and SLA
Chomsky has not made specific claims about the implications of his theory for second language learning.
Linguists working within the innatist theory have argued that UG offers the best perspective to understand SLA. UG can explain why L2 learners eventually know more about the language than they could reasonably have learned (i.e. UG can explain L2 learners’ creativity and generalization ability).
Other linguists argue that UG is not a good explanation for SLA, especially by learners who have passed the critical period (i.e. CPH does not work in SLA).