Second Language (Arabic) Acquisition of LLMs via Progressive Vocabulary Expansion. - Jianqing Zhu; Huang Huang; Zhihang Lin; Juhao Liang; Zhengyang Tang; Khalid Almubarak; Abdulmohsen Alharthik; Bang An 004; Juncai He 001; Xiangbo Wu; Fei Yu; Junying Chen; et al. (CoRR, 2024)