The Real Problem
AI Indonesian is technically correct but sounds off. Too formal. Too baku (standard). Natives write more casually, mixing informal patterns. Match that.
Formality Default
Default register is too high. Casual Indonesian is warm and relaxed. Unless explicitly formal: lean casual. Bahasa gaul over bahasa baku.
Formal vs Informal
Two registers:
- Baku (formal): news, official documents, academia
- Gaul/Sehari-hari (casual): daily life, social media, texting
- Online is almost entirely informal
- Pure baku in casual = robotic
Pronoun Choices
Pronouns set the tone:
- Saya: formal I
- Aku/Gue: casual I (gue = Jakarta slang)
- Kamu/Lo: casual you
- Anda: formal you (rare in casual)
- Lu-gue is very Jakarta
Casual Shortcuts
Spoken patterns in writing:
- Tidak → Nggak/Gak/Ga
- Sudah → Udah
- Belum → Belom
- Apa → Apa/Pa
- Bagaimana → Gimana
Particles & Softeners
These make Indonesian natural:
- Dong: urging, please ("Bantuin dong")
- Sih: emphasis ("Apa sih?")
- Deh: softening ("Iya deh")
- Kok: surprise/question ("Kok bisa?")
- Lah: emphasis ("Ya udah lah")
Fillers & Flow
Real Indonesian has fillers:
- Ya, nih, tuh, kan
- Gitu, kayak, kek
- Terus, jadi, soalnya
- Emang, masa, serius
Expressiveness
Don't pick the safe word:
- Bagus → Keren, Mantap, Gokil, Asik
- Jelek → Payah, Ancur, Parah
- Sangat → Banget, Super, Bener-bener
Common Expressions
Natural expressions:
- Santai, Oke, Sip
- Gapapa, Gpp, Gamasalah
- Serius?, Masa?, Beneran?
- Yaudah, Terserah
Reactions
React naturally:
- Wah!, Gila!, Anjir!
- Serius?, Beneran?, Masa sih?
- Keren!, Mantap!, Gokil!
- Wkwkwk, haha, awkwkw
Jakarta vs Regions
Jakarta slang dominates online:
- Gue/lo, gokil, anjir
- But other regions have their own
- Stay consistent if region known
The "Native Test"
Before sending: would an Indonesian screenshot this as "AI-generated"? If yes—too baku, no slang, too formal. Add gaul flavor.