Bilingual Contracts in Indonesia: When Is Indonesian Required?

The role of Indonesian

For certain legal relationships in Indonesia, the use of Indonesian may be mandatory or expected in practice. The question should be assessed with reference to the parties, subject matter, sector, and rules in force when the contract is signed.

• Check sector-specific rules and obtain appropriate legal advice.
• Do not assume that a foreign-language contract is always invalid or always sufficient.

Language clauses to consider

A contract should address which language controls if the texts differ, how discrepancies will be resolved, and whether a translation is for reference or has equal status. The clause should align with the governing law, forum, and enforcement strategy.

• Identify the controlling version.
• Use defined terms consistently throughout the contract and schedules.

Contract translation workflow

Start with a glossary, clause structure, party names, numbers, schedules, and defined terms. Cross-review the text and perform a final check of cross-references, tables, signatures, and annexes. If the contract is being negotiated, an interpreter can support the meeting as well as the written translation.

Brief for a quotation

Provide the language pair, contract type, word or page count, draft status, signing date, receiving parties, and any meeting-interpreting needs. Do not send a confidential final version through an unapproved channel.