Language Studies Indonesia (LSI) runs Bahasa Indonesia programmes built specifically for foreign learners, from absolute beginner through advanced. Its main Jakarta campus is a large converted house on Jalan Bunga Melati in Cipete Selatan, South Jakarta, with a satellite classroom in the Karindra Building on Jalan Palmerah Selatan in Central Jakarta. Classes run as one-to-one sessions or small groups of up to four learners, in 90-minute blocks.

Teaching is delivered by BIPA-trained instructors and the curriculum is aligned to CEFR levels, so learners finish with a recognised certificate rather than an informal record of hours. As well as classroom study, LSI sends teachers to offices and homes across Jakarta, runs live online classes for students outside Indonesia, and offers a structured two-week immersion programme for people who need functional Indonesian fast.

The school is a common choice for expatriates on KITAS work permits, diplomatic staff and trailing spouses, and it also handles corporate contracts for companies onboarding foreign managers. A free trial class is offered before enrolment, and all administration and teaching support is conducted in English.