Wes was comfortable interacting with the community. He seemed to fit in well in the society, and he showed positived actitudes towards the culture.
Comprehensible Input Hypothesis
Stephen Krashen's theory nn
The most important source of L2 learning is comprehensible input which learners process for meaning and which contains something to be learned, mostly through listening to oral messages that surround them, such as street signs, personal letters, books, etc.
But Wes won this round again, he lived sorrounded by input and he wasn't improving his gramatical competence.