Learn Indonesian with Ossi

04/06/2026

Quick win: spot market-moving phrasing in Indonesian news in 10 seconds. Here’s how. ⚡

Rule of thumb: prefix meN- indicates an action by an agent; ter- often shows a state or event. Traders can tell whether an event happened or a condition exists and act faster.

Examples:
- “memproduksi” (to produce) → action by a company, may indicate supply changes.
- “terbakar” (was burned/in a burned state) → incident confirmed; different signal.

Save this post if you trade the Indonesian/ASEAN markets.
Want a 1-page affix cheat sheet? Comment “Cheat” and I’ll share it.

02/06/2026

We saved a regulator from an ambiguous clause — with 30 minutes of affix training. 🚨

A policy draft used “dapat dikenakan” (may be imposed) vs “harus dikenakan” (must be imposed). That swap changed permissiveness. One session helped reviewers spot and fix it before publication.

Example:
- Modal nuance: “dapat” (may/can) vs “harus” (must). Affix “-kan” often makes verbs transitive, altering obligations.

Want a 30-minute online workshop for your legal team?
Reply with your sector, and I’ll share a tailored agenda.

30/05/2026

Still losing nuance in Indonesian → English translations? One missing affix could cost your client millions. ⚠️

Indonesian affixes change voice, aspect, causation, and sometimes legal responsibility. Small word changes in contracts can flip who’s liable. Learn to spot the dangerous ones and save time (and reputation).

Examples:
- “diperiksa” = was examined (passive) vs “memeriksa” = to examine (active). In contracts, that flips responsibility.
- “menyebabkan” = to cause (causative) vs root “sebab” = cause.

Want a 3-minute checklist translators use to spot dangerous affixes?
Write “Checklist” below, and I’ll DM it.

27/05/2026

You can have a senior role and still sound junior in Indonesian writing.

That happens surprisingly often in professional communication.

Example:

“Saya suruh tim cek ini.”

versus

“Saya telah menugaskan tim untuk memeriksa hal ini.”

The second version signals:

• Structure

• Leadership

• Professionalism

• Authority

Language not only transfers information. It also signals competence.

This becomes especially important when communicating with:

• Clients

• Ministries

• Executives

• Institutional stakeholders

Most professionals are never explicitly told when their Indonesian sounds too casual. But people notice.

I created a short professional guide covering 5 common Indonesian writing mistakes foreign professionals make.

Comment “CHECKLIST,” and I’ll send it.

25/05/2026

Many foreign professionals speak Indonesian well. But their emails still sound too casual professionally. That gap matters more than people realize.

For example: “Saya mau kirim dokumen ini” is understandable.

But in many professional contexts:

“Saya akan mengirimkan dokumen tersebut.”

sounds more deliberate, structured, and credible.

Small affixation and wording choices can affect how your communication is perceived in:

• Reports
• Negotiations
• Stakeholder communication
• Institutional interactions

Professional Indonesian is not just about meaning. It is also about tone and authority.

I recently put together a short guide:

“5 Indonesian Writing Mistakes That Damage Professional Credibility”

for foreign professionals working with Indonesian teams, clients, and institutions.

Comment “GUIDE” and I’ll send it.

16/04/2026

Why does it feel hard sometimes to be genuinely proud of our language or our identity?

Why does it feel hard sometimes to be genuinely proud of our Indonesian language or our identity?

31/03/2026

The easy tenses of the Indonesian language

30/03/2026

Have you ever heard of the word "sungkan"?

29/03/2026

Did you know?

polisi (police)
tidur (sleep)

28/03/2026

How's the weather in your area today?
Gimana cuaca di tempat kamu hari ini?

bagaimana (formal), gimana (informal/colloquial) = how

is >>> The Indonesian language (Bahasa Indonesia) does not use a copular verb equivalent to "to be" (am, is, are) in most sentences, particularly when linking a subject to an adjective or a noun.
the >>> Unlike English, which uses "the" to designate specific nouns, Indonesian usually drops this word.

cuaca = weather
in = di
tempat = place, area
hari = day
ini = this day
hari ini = today / this day