Locale Sl Si

Reference data for the Slovenian (Slovenia) locale — endonym Slovenščina (Slovenija), written in the Latin script, left-to-right (LTR).

Identifiers

• BCP 47 tag: sl-SI
• ISO 639-1: sl
• ISO 639-3: slv
• Script: Latn (Latin)
• Region: SI (Slovenia)
• Text direction: ltr — left-to-right (LTR)

Speakers (approximate)

• L1 (native): 2,500,000
• L2 (additional): 300,000
• L1+L2 (total): 2,800,000

Base locale

This is a regional variant of Locale Sl 001 (Slovenian), the base/macro locale for this language.

Pluralization

CLDR plural categories for this locale: one, two, few, other (4 forms).

• one — v = 0 and i % 100 = 1 (e.g. 1, 101, 201, 301, …)
• two — v = 0 and i % 100 = 2 (e.g. 2, 102, 202, 302, …)
• few — v = 0 and i % 100 = 3..4 or v != 0 (e.g. 3, 4, 103, 104, …)
• other — everything else (e.g. 0, 5~19, 100, 1000, …)

See Unicode Messageformat for writing plural messages using these categories.

Translating into this locale

Apply Locale Sl 001 with the conventions of Slovenia.

• Formats: euro; dates 17. 10. 2026; 24-hour clock; decimal comma.
• Terminology: use Slovenian EU terminology for legal and administrative content; Italian and Hungarian are co-official in some municipalities, so bilingual materials exist there.

Common pitfalls

• Using non-Slovene place-name forms for border areas.
• Using Croatian vocabulary.
• The general pitfalls in Locale Sl 001 also apply.

Learn more

• Locale for BCP 47 identifiers, locale-sensitive formatting, pluralization, and text-direction concepts that apply across all locales.
• Unicode Messageformat for writing plural/selection messages correctly for this locale's grammar.
• Unicode CLDR locale data for number, date, and currency formats (https://cldr.unicode.org)