How hard is Indonesian to learn?
The Foreign Service Institute classifies Indonesian as a Category II language, requiring approximately 900 hours of study for English speakers to reach professional working proficiency. This places it in the easier-to-moderate range compared to languages like Mandarin or Arabic, signaling that English speakers can make solid progress without facing the steepest learning curves.
Several factors contribute to Indonesian's relative accessibility. It uses the Latin alphabet, eliminating the need to master an entirely new writing system. While Indonesian belongs to the Austronesian language family—distinctly different from English's Indo-European roots—its grammar is notably straightforward. The language lacks complex verb conjugations, case systems, and gendered nouns that complicate many European languages. Pronunciation is also consistent and phonetic. The main challenges involve building vocabulary and mastering unfamiliar grammatical patterns like affixation, but these are manageable within the 900-hour timeframe for motivated learners.
About Indonesian
| Native speakers (L1) | 78.0M |
|---|---|
| Language family | Austronesian (Malayo-Polynesian) |
| Primary regions | Indonesia |
| Writing system | Latin |
Speaker counts, language-family and region data from Wikipedia (Ethnologue figures), licensed CC BY-SA 4.0.
Calculate your study hours →Hours to learn Indonesian → · How to approach it →
Hours and weeks are the canonical FSI figures for Category II, from the US State Dept FSI list (public domain), verified June 2026. How we compile this — confirm against state.gov on an operator pass before relying on it.