Svalbard & Jan Mayen languages and locale codes

Use a Svalbard & Jan Mayen locale in a product

When content is written in Norwegian Bokmål, use the lang tag below to describe the text. The Intl locale selects regional formatting. This is one example from the table, not a claim about every visitor's language preference.

<html lang="nb">
new Intl.NumberFormat("nb-SJ").format(1234567.89);

Compare number and date formatting

These examples use 1234567.89 and the fixed instant 2026-01-15T13:45:00Z, with dates displayed in UTC. Intl computes the results when this site is built; your browser and locale-data version may differ. Unsupported tags are identified instead of showing default-language output.

On narrow screens, scroll the table horizontally.

Currency examples use the fixed value 1234.5. The SIX snapshot is as of 2026-09-26; territory mappings use CLDR 49. Specify each currency explicitly; formatting is not an exchange rate.

new Intl.NumberFormat("nb-SJ", { style: "currency", currency: "NOK" }).format(1234.5);

Before adopting a tag, run Intl.NumberFormat.supportedLocalesOf() and Intl.DateTimeFormat.supportedLocalesOf() in your target runtime. A locale does not select a time zone or translate interface text; specify currency explicitly when formatting money.

Intl locale support reference (MDN)