Supported Languages

Built-in languages

Each language has its own rules module in pluralio/rules/ and is registered automatically when you import pluralio.

Language	Code	Regex rules (P+S)	Irregulars	Uncountables	Status
English	en	7 + 22	684	219	Complete
Spanish	es	9 + 8	354	92	Complete
Portuguese	pt	9 + 13	393	88	Complete
French	fr	6 + 4	100	92	Complete
Italian	it	19 + 12	249	126	Complete
Esperanto	eo	4 + 2	0	39	Complete

Language-specific notes

English (en)

• 684 irregulars covering Latin/Greek plurals (-i, -a, -ae, -ina), compound words, and special cases.

• Regex rules handle -s, -es, -ies, -ves, and -oes endings.

• 219 uncountables including mass nouns, non-noun words, and invariable terms.

Spanish (es)

• Accent restoration: singulars that lose an accent in the plural are handled via irregular mappings (e.g. joven → jóvenes).

• 92 uncountables.

Portuguese (pt)

• Hyphenated compound handling for verb+noun constructions (quebra-mar → quebra-mares).

French (fr)

• Both segments of hyphenated compounds are pluralized, skipping function words (articles, prepositions) and invariable compounds (porte-monnaie).

• -al → -aux, -au/-eau → -aux/-eaux, -eu → -eux; the -als/-ails/-eus/-ous exceptions live in the irregular tables.

Italian (it)

• Gender-aware pluralization: -o → -i, -a → -e, -e → -i, -ca → -che, -ga → -ghe.

• Hyphenated compounds pluralize all noun segments.

Esperanto (eo)

• Simplest pluralization system: -j suffix for nominative plural, -jn for accusative plural.

• Zero irregulars — the language is perfectly regular by design.

• 39 uncountables: pronouns, correlatives, and particles.

Roadmap

Version	Goal	Status
2.3.0	Bug fixes and documentation corrections	Released
2.4.0	Catalan (ca)	Planned
3.0.0	German (de)	Planned