The study investigates cross-linguistic influence (CLI) on second language use among college students in Sorsogon during the 2022-2023 school year. It found that students predominantly use Taglish and Bicol dialects in various communication contexts, revealing that prior language knowledge and socio-cultural factors significantly affect their speaking skills in English. The research proposes an English-only policy to mitigate the impact of CLI on students' language proficiency.