Some Indian trainers teach in Hindi or bilingual formats — search "NLP course Hindi" surfaces them. IONI teaches in English, deliberately, and here's the honest trade-off to consider either way.
Learning in your strongest language helps comprehension of nuance — genuinely. Two cautions regardless of language: the same evaluation standard applies (observed practice hours, class size, assessment), and certification material is largely English-anchored if that matters to your goals.
Our own Hindi content is arriving for the informational layer first; training cohorts remain English-medium.