Tā bǎ xuéxí yǔyán dàngzuò yī zhǒng xīnlíng xiūliàn.
He treats language learning as a form of spiritual cultivation.
Tips
culture
修炼 is rooted in Taoist and Buddhist cultivation practices — the disciplined path toward spiritual attainment or immortality. In modern usage it has expanded metaphorically to describe any long-term, disciplined self-improvement process.