Indonesian capital letters identify the beginning of a sentence and the proper-name status of particular people, places, offices, and institutions. They do not simply mark every important word. That difference makes English capitalization habits an unreliable guide.
The deepest contrast is between institutional naming and ordinary description: Kementerian Luar Negeri names one institution, while kementerian itu merely refers to “that ministry.” This page follows EYD V capitalization and leaves pronunciation, derivational meaning, and broader stylistic editing to their dedicated pages.
The proper-noun guide develops the grammatical behavior of names; this page focuses only on their written capitals.
Sentence beginnings
Capitalize the first letter of a sentence. The rule applies after a full stop and at the beginning of a direct quotation that is itself a sentence.
Kereta terakhir berangkat pukul sembilan malam.
The last train leaves at nine in the evening.
Ibu berkata, “Besok kita berangkat lebih pagi.”
Mom said, “Tomorrow we'll leave earlier.”
The capital in Kereta or Besok does not make either word a proper noun. Its position triggers the capital. Move the word into the middle of a sentence and it returns to lowercase: Kami naik kereta besok pagi.
Names of people
Capitalize each element of a person’s name: Siti Aminah, Joko Widodo, Chairil Anwar. A nickname or epithet functioning as part of a recognized name is capitalized as well. Ordinary relationship or profession words remain lowercase unless another rule—such as a title before a name—applies.
Siti Aminah bertemu Joko Widodo di Surakarta pada tahun 2012.
Siti Aminah met Joko Widodo in Surakarta in 2012.
Nama lengkap penyair itu Chairil Anwar.
The poet's full name is Chairil Anwar.
EYD V has more detailed provisions for elements such as bin, binti, boru, and van. The practical beginner insight is that a lowercase element can belong inside a properly capitalized full name; do not silently redesign a person’s official spelling.
Titles and offices: attached name versus ordinary role
A title, position, or rank is capitalized when it precedes a person’s name or functions as a substitute for a particular official name, institution, or place. It stays lowercase when it is a common role description.
| Capitalized naming use | Lowercase descriptive use |
|---|---|
| Presiden Joko Widodo | presiden itu |
| Kapten Ratna | kapten itu |
| Profesor Anton M. Moeliono | seorang profesor |
| Gubernur Papua Barat | para gubernur |
Presiden Joko Widodo meresmikan bendungan itu pada tahun 2021.
President Joko Widodo inaugurated the dam in 2021.
Setelah acara selesai, presiden itu berbicara dengan para wartawan.
After the event ended, the president spoke with the journalists.
The capital in Presiden Joko Widodo binds the office title to the person’s name. In presiden itu, the demonstrative points to a role already known from context; the expression is not a proper name.
Titles used as direct forms of address are also capitalized under EYD V: Selamat pagi, Dokter and Silakan duduk, Prof. (formal) address is one frequent setting for this pattern. This does not mean dokter and profesor are always capitalized.
Kapten Ratna akan memimpin latihan sore ini.
Captain Ratna will lead the training exercise this afternoon.
Kapten itu sedang berbicara dengan para anggota tim.
The captain is speaking with the team members.
Institutions, states, organizations, and documents
In the full official name of a country, institution, organization, body, or document, capitalize the first letter of each content word. Function words such as dan remain lowercase unless they begin the name.
| Full official name | Later ordinary description |
|---|---|
| Republik Indonesia | republik itu |
| Kementerian Luar Negeri | kementerian tersebut |
| Universitas Indonesia | universitas itu |
| Perserikatan Bangsa-Bangsa | organisasi internasional tersebut |
Kementerian Luar Negeri menerbitkan pernyataan resmi tadi malam.
The Ministry of Foreign Affairs issued an official statement last night.
Besok delegasi itu akan mengunjungi Universitas Indonesia.
Tomorrow the delegation will visit the University of Indonesia.
The hyphen and capitals in Perserikatan Bangsa-Bangsa are both meaningful: Bangsa-Bangsa is a fully repeated element inside an official name, so both repeated parts begin with a capital. Do not change it to Perserikatan Bangsa bangsa or close it into one word.
Indonesia menjadi anggota Perserikatan Bangsa-Bangsa pada tahun 1950.
Indonesia became a member of the United Nations in 1950.
Once the full name has established the referent, a later description normally returns to lowercase: kementerian itu, universitas tersebut, organisasi tersebut. Capitalization lets the reader distinguish a label on an institution’s door from a common noun phrase describing its category.
Places and geographical names
Capitalize geographical proper names: Asia Tenggara, Jawa Barat, Danau Toba, Gunung Semeru, and Sungai Musi. A generic word becomes part of the name when it identifies that specific feature. The same word is lowercase when it merely describes a type: danau itu, gunung tersebut, sebuah sungai.
Mereka mendaki Gunung Semeru pada musim kemarau.
They climbed Mount Semeru during the dry season.
Dari kejauhan, gunung itu tampak tertutup awan.
From a distance, the mountain looked covered in clouds.
Kami menyeberangi Sungai Musi menjelang matahari terbenam.
We crossed the Musi River near sunset.
Some geographical names also indicate origin in product and cultural labels, such as batik Cirebon and kopi Gayo. The category word remains lowercase, while the geographical name keeps its capital.
Ethnic groups, peoples, and languages
Capitalize the proper name of a nation, ethnic group, language, or script, but not the generic category word before it. Therefore write bangsa Indonesia, suku Dani, bahasa Indonesia, bahasa Jawa, and aksara Kaganga.
Nadia belajar bahasa Indonesia dan bahasa Jawa di kampus.
Nadia studies Indonesian and Javanese at university.
Penelitian itu membahas tradisi lisan suku Dani.
The study discusses the oral traditions of the Dani people.
The required capitalization in bahasa Indonesia is asymmetrical: bahasa is the common noun “language,” while Indonesia supplies the proper name. English normally packages both ideas into the single capitalized adjective Indonesian, so English speakers often overcorrect to Bahasa Indonesia inside a sentence. EYD V requires lowercase bahasa there.
When a national, ethnic, or language name becomes the base of a derived word, EYD V uses lowercase: pengindonesiaan kata asing, keinggris-inggrisan, and kesunda-sundaan. Preserve the established solid form and hyphen: pengindonesiaan is one word; keinggris-inggrisan contains a hyphen because of partial repetition.
Pedoman itu mengatur pengindonesiaan istilah asing.
The guidelines regulate the Indonesianization of foreign terms.
Capitalization is not decoration
Official materials sometimes use all capitals for layout, headings, or signs. That graphic choice does not change the underlying sentence rule. In running prose, resist capitalizing a noun merely because it refers to a respected person, a major department, or an important event.
Ordinary Indonesian also has no mandatory accent marks. Capitalization does not create accented pairs: write bahasa Indonesia, not bahása Indonésia. A teaching-only é can clarify an e pronunciation, but it is not required in normal EYD V orthography.
Common Mistakes
Capitalizing the generic word bahasa
❌ Saya sedang belajar Bahasa Indonesia.
Incorrect—bahasa is a common category noun in this phrase.
✅ Adik saya mulai belajar bahasa Indonesia tahun ini.
My younger sibling started learning Indonesian this year.
Capitalizing an ordinary role title
❌ Setelah rapat, Presiden itu langsung pergi.
Incorrect—presiden itu is an ordinary descriptive noun phrase, not a title attached to a name.
✅ Setelah rapat, presiden itu langsung meninggalkan ruangan.
After the meeting, the president immediately left the room.
Lowercasing a title attached to a name
❌ Besok kapten Ratna akan memimpin latihan pukul delapan.
Incorrect—Kapten is capitalized when the rank directly precedes Ratna's name.
✅ Besok Kapten Ratna akan memimpin latihan pukul delapan.
Tomorrow Captain Ratna will lead the training exercise at eight.
Lowercasing an official institution name
❌ Ia bekerja di kementerian luar negeri.
Incorrect for the official institution name—each content word requires a capital.
✅ Kakaknya bekerja di Kementerian Luar Negeri.
Her older sibling works at the Ministry of Foreign Affairs.
Lowercasing the proper name of an ethnic group
❌ Museum itu memamerkan benda budaya suku dani.
Incorrect—the ethnic-group name Dani is a proper name.
✅ Pameran itu menampilkan kerajinan dari suku Dani.
The exhibition displays handicrafts from the Dani people.
Key Takeaways
Capitalize sentence initials and proper names. Attach capitals to titles when they precede a name or stand for a specific official office, but lowercase ordinary roles such as presiden itu and dokter tersebut. Capitalize content words in full institution names, geographical names, and the proper element in bahasa Indonesia or suku Dani. Institutional naming—not importance—drives the system.
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