Second-language acquisition Knowledge graph concept · also referred to as learning a language as a second language, foreign learners, language-learning, language learning Mentioned in I trained an AI model on my phone X thread · 2026-09-13 Economic Burden of Language Complexity post · 2024-05-04 Related concepts German language 2 AI model specialization 1 Economic cost of language learning 1 Grammatical gender 1 Labor migration 1 Language complexity 1 Lost wage 1 Machine translation 1