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FlashBoss - Indonesian Core: 1,000 words, the foundation

Fibonacci spaced repetition and boss fights.

Indonesian Core is the first thousand words of a 3,000-word course. Forty themed clusters carry you from first words and the family through the market, the road and the clinic to work, law and the polite forms — with an example sentence on every card, and grammar introduced only as the tiers reach it.

And Indonesian arrives speaking your language: every card carries its translations, study notes and lessons in English, German, Japanese, Russian, Simplified Chinese, Spanish or Arabic (Arabic in the new window). Study Indonesian through whichever you call home.

In this pack:

• 1,000 high-frequency Indonesian words across five tiers, in themed clusters

• Translations and study notes in English, German, Japanese, Russian, Simplified Chinese, Spanish and Arabic — full coverage on every card

• 26 reference lessons — the active prefix, the ber- verbs, yang, time without tense, counting and the clock — readable in English, German, Japanese, Russian, Simplified Chinese, Spanish and Arabic

• British and American spelling both supported, on the cards and in the lessons

• Text-to-speech on every word and example sentence, in a neural bahasa baku voice

• Boss-fight graduation: no cluster is cleared until its hardest words are mastered

Continue into Indonesian Pareto 1 — tiers 6 to 10 — for the working vocabulary of trade, the office, the republic and the long words. The full word list and all reference lessons for every FlashBoss pack are available on the website, along with a playable boss-fight demo. The manual link in the right sidebar opens the voice samples.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI was used in the coding of this game, the asset generation, brainstorming practical solutions,