Irregular Plurals (3)
Irregular nouns that change substantially / Substantius irregulars que canvien de manera substancial / Sustantivos irregulares que cambian de forma considerable
For a variety of historical reasons, some words change in spelling substantially when made plural.
Per diverses raons històriques, algunes paraules canvien considerablement l’ortografia quan passen al plural.
Por diversas razones históricas, algunas palabras cambian notablemente su ortografía al formar el plural.
| Singular | Plural |
| mouse | mice |
| louse | lice |
| die | dice |
| ox | oxen |
| child | children |
| person | people |
| penny | pence (in British usage) |