ABSTRACT Violence, racism, and xenophobia among immigrants often stem from deep-seated language and cultural disparities, transcending mere racial or ethnic categorizations. This in-depth study, conducted among 16 informants representing diverse ethnic backgrounds—majorities, minorities, and educators in West Kalimantan’s multi-ethnic schools—employs an ethnographic approach. Delving into the tapestry of field data and factual insights, this research unveils how verbal violence and discrimination germinate from the complex interplay of language and cultural biases among students. Echoes of superiority resonate within the majority ethnic group, where language and culture are perceived as hallmarks of local eminence, relegating ethnic minorities to second-class status. The study’s findings trace this arrogance to a historical tapestry woven from conflicts between native ethnic factions and immigrant communities, culminating in the stark social segregation between them. A fascinating implication emerges, highlighting the pivotal role of Indonesia as a bridge for inter-ethnic communication. Its use fosters social cohesion, harmony, and inter-ethnic tolerance. This research charts a roadmap towards rectifying past missteps, assuaging grievances, and charting strategies to avert future inter-ethnic discord caused by deep-rooted cultural and linguistic differences.