Localizely logo
Sign up

Language code: und

Technical information about ISO 639 language code und

Documentation

The table below provides technical details for the Undetermined language, designated by the und code from the ISO 639-2 standard.

Code

und

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

UTF-8, UTF-16, UTF-32

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.

Try now for Free

Documentation

Localizely logo
About
Resources
Free tools
Boring stuff
Newsletter
Copyrights 2025 © Localizely