CH · CHE
Switzerland languages and locale codes
Official or primary languages with practical BCP 47 locale recommendations.
BCP 47
Languages and locale codes
| Language | Code | Recommended locale | Status |
|---|---|---|---|
| German | Official | ||
| Swiss German | De facto official | ||
| French | Official | ||
| Italian | Official | ||
| Romansh | Regional official |
Use a Switzerland locale in a product
When content is written in German, 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="de">
new Intl.NumberFormat("de-CH").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.
| Locale | Number | Date | Currency |
|---|---|---|---|
de-CH | 1'234'567.89 | 15. Januar 2026 | CHF: CHF 1'234.50 |
gsw-CH | 1'234'567.89 | 15. Januar 2026 | CHF: 1'234.50 CHF |
fr-CH | 1'234'567,89 | 15 janvier 2026 | CHF: 1'234.50 CHF |
it-CH | 1'234'567.89 | 15 gennaio 2026 | CHF: CHF 1234.50 |
rm-CH | 1 234 567,89 | 15 da schaner 2026 | CHF: CHF 1 234,50 |
Currency examples use the fixed value 1234.5. SIX and CLDR snapshot: 2026-09-26. Specify each currency explicitly; formatting is not an exchange rate.
new Intl.NumberFormat("de-CH", { style: "currency", currency: "CHF" }).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.
Data provenance
Sources
- ISO 3166-1 country codes
- Unicode CLDR territory information
- SIX: ISO 4217 List One
- Unicode CLDR 48 currency territory data
Data snapshot: 2026-09-26