From English-Centric to Effective Bilingual: LLMs with Custom Tokenizers for Underrepresented Languages. - Artur Kiulian; Anton Polishko; Mykola Khandoga; Yevhen Kostiuk; Guillermo Gabrielli; Lukasz Gagala; Fadi Zaraket; Qusai Abu Obaida; Hrishikesh Garud; Wendy Wing Yee Mak; Dmytro Chaplynskyi; Selma Belhadj Amor; et al. (CoRR, 2024)