The document discusses different views on whether L1 and L2 acquisition are the same or different. It notes that behaviourist views see the processes as similar, while innatist views emphasize the need for past experience in L2. Social interactionist perspectives stress that L2 must be learned through contextualized and motivated interaction. While the learning processes may be similar, involving different phases, the conditions for L1 and L2 acquisition are different in terms of time of exposure, artificial contexts, and motivation levels. An important open question is whether younger always means better for L2 learning.