Locale Fi Fi

Reference data for the Finnish (Finland) locale — endonym Suomi (Suomi), written in the Latin script, left-to-right (LTR).

Identifiers

• BCP 47 tag: fi-FI
• ISO 639-1: fi
• ISO 639-3: fin
• Script: Latn (Latin)
• Region: FI (Finland)
• Text direction: ltr — left-to-right (LTR)

Speakers (approximate)

• L1 (native): 5,200,000
• L2 (additional): 500,000
• L1+L2 (total): 5,700,000

Base locale

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

Pluralization

CLDR plural categories for this locale: one, other (2 forms).

• one — i = 1 and v = 0 (e.g. 1)
• other — everything else (e.g. 0, 2~16, 100, 1000, …)

See Unicode Messageformat for writing plural messages using these categories.

Translating into this locale

Apply Locale Fi 001 with the conventions of Finland.

• Formats: euro (12,50 €); dates 17.10.2026; 24-hour clock (klo 17.30); decimal comma; metric units.
• Bilingual context: Finnish and Swedish are national languages; public bodies publish bilingual content, and place names have both forms (Helsinki / Helsingfors). Keep both in bilingual materials.
• Terminology: use Finnish EU terminology and the national term bank (Sanastokeskus TSK) for technical content.
• Tone: plain, factual, and concise; informal address is normal.

Common pitfalls

• Using Swedish word order or Swedish place names without need.
• Using te in a consumer UI.
• The general pitfalls in Locale Fi 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.
• Sanastokeskus TSK, Finnish Terminology Centre