What language did guru Nanak speak the most?

Guru Nanak, the founder of Sikhism, primarily spoke Punjabi, as he lived in the Punjab region of South Asia. His teachings and hymns, which are compiled in the Guru Granth Sahib, were predominantly composed in this language, incorporating elements of various dialects and languages of the region. Additionally, he also communicated in Hindi and Persian during his travels and interactions with diverse communities.