Step inside any high school classroom in the Philippines today, and you are bound to hear a fascinating linguistic dance. A science teacher explaining the intricacies of the water cycle might bypass rigid textbook English, telling her students, “‘Pag sobrang init ng araw, mag-e-evaporate ‘yung water from the ocean, tapos magko-condense siya up there para maging clouds.”

Instantly, the students nod in understanding. The intimidation factor of complex scientific jargon melts away, replaced by the comforting, conversational rhythm of Taglish.

Within our educational system, the bilingual policy rigidly assigns languages by subject: English for Science and Mathematics, and Filipino for Araling Panlipunan. Yet, the reality on the ground demands a much more blended approach. Teachers naturally gravitate toward code-switching to lower the cognitive load, ensuring students actively participate rather than shrinking back in fear of committing a grammatical blunder.

But while this conversational blending serves as an excellent immediate bridge, linguists and educators are raising a vital question: at what cost to long-term proficiency?

The academic drawbacks often reveal themselves when the bell rings for exam week. Tasked with writing a formal English essay, that same student who perfectly understood the water cycle might struggle to construct a sentence without relying on Filipino syntax or filler words. Lacking sustained exposure to formal English structure, they might write, “The water will evaporate tapos it forms clouds.” Conversely, if challenged to write entirely in pure Filipino, they often find themselves searching for proper terms like pagsingaw (evaporation) or paglapot (condensation).

This linguistic habit inevitably ripples beyond the classroom. Fast forward to a corporate job interview, and a brilliant, capable fresh graduate might stumble when articulating their qualifications in straight English, nervously defaulting to Taglish. In an increasingly globalized workforce, this can unintentionally project a lack of formal communication skills.

Taglish is undeniably a highly effective, empathetic instructional tool. It bridges immediate learning gaps and makes intimidating subjects accessible. However, we must ensure it is used intentionally — serving as a temporary scaffold for our students rather than a permanent substitute for mastering the rich, distinct structures of both English and Filipino.

Based on studies by Villanueva & Gamiao (2022), Ral et al. (2026) and Chureson (2013) & Estremera (2021.