Language code: und
Technical information about ISO 639 language code und
Documentation
- What is Localizely?
- Getting started
- Localization workflow
- Translation editor
- Flutter Over-the-Air updates
- Flutter In-Context Editing
- Project branching
- Public projects
- Professional translation services
- Machine Translation
- AI Translation
- Translation Memory
- Glossary
- Tasks
- Reports and Statistics
- Figma integration
- AWS S3 integration
- GitHub integration
- GitLab integration
- Bitbucket integration
- CLI
- Configuration file
- Supported file formats
- Language & Country Codes
- Referral Program
- Affiliate Program
- FAQ
The table below provides technical details for the Undetermined language, designated by the und code from the ISO 639-2 standard.
| Code |
|
| Standard | |
| Name | Undetermined |
| Text direction | Left-to-Right |
| Key facts | ISO 639-1 code “und” is a special placeholder meaning the language is undeterminedIt is used in cataloging, archiving, and digital encoding when the actual language of a text or recording cannot (yet) be identifiedBecause it is not a real linguistic system, it has no native speakers, writing system, or dialectsThe code helps prevent data loss by allowing materials of unknown language to be stored until proper identificationIt pairs with the ISO 15924 script code “Zyyy” (unspecified script) in some metadata standards. |
| Character encodings | |
| Supported in Localizely |
The Undetermined language, identified by the code und, falls under the 'Special' category in terms of its scope and is classified as 'Special' by its type.
Previous: Language Code List
Read next: Language Plural Rules
Tired of manually editing translation files?
Our platform streamlines software localization for you.
Documentation
- What is Localizely?
- Getting started
- Localization workflow
- Translation editor
- Flutter Over-the-Air updates
- Flutter In-Context Editing
- Project branching
- Public projects
- Professional translation services
- Machine Translation
- AI Translation
- Translation Memory
- Glossary
- Tasks
- Reports and Statistics
- Figma integration
- AWS S3 integration
- GitHub integration
- GitLab integration
- Bitbucket integration
- CLI
- Configuration file
- Supported file formats
- Language & Country Codes
- Referral Program
- Affiliate Program
- FAQ
Resources
- What is Localizely?
- Getting started
- Localization workflow
- Translation editor
- Flutter Over-the-Air updates
- Flutter In-Context Editing
- Project branching
- Public projects
- Professional translation services
- Machine Translation
- AI Translation
- Translation Memory
- Glossary
- Tasks
- Reports and statistics
- Figma integration
- AWS S3 integration
- GitHub integration
- GitLab integration
- Bitbucket integration
- CLI
- Configuration file
- Supported file formats
- Language & Country Codes
- Referral Program
- Affiliate Program
- I18N Questions
- FAQ
Free tools
- ICU message for translators
- ICU message editor
- Hreflang generator
- Hreflang checker
- JSON Flattener
- JSON Validator
- YAML Validator
- XML Validator
- CSV Validator
- Text Compare
- Text Encoding Converter
- Localization File Converter
- JSON Word Counter
- ARB Word Counter
- Translation Cost Calculator
Boring stuff
Newsletter
Copyrights 2026 © Localizely