| Part of speech | common noun |
|---|---|
| Hyphenation | libr·o |
| Singular | Plural | |
|---|---|---|
| Nominative | libro | libroj |
| Accusative | libron | librojn |
| Afrikaans | boek |
|---|---|
| Albanian | libër |
| Catalan | llibre |
| Chinook Jargon | pipa; buk |
| Czech | kniha; knížka |
| Danish | bog |
| Dutch | boek |
| English | book |
| English (Old English) | boc |
| Faeroese | bók |
| Finnish | kirja |
| French | livre |
| German | Buch |
| Greek | βιβλίο; κιτάπι |
| Hawaiian | puke |
| Hungarian | könyv |
| Icelandic | bók |
| Italian | libro |
| Jamaican Patois | buk |
| Latin | caudex; codex; liber |
| Low German | book |
| Luxemburgish | Buch |
| Malay | buku; kitab |
| Norwegian | bok |
| Papiamento | buki |
| Polish | książka |
| Portuguese | livro |
| Romanian | carte |
| Russian | книга |
| Saterland Frisian | Bouk |
| Scots | beuk |
| Scottish Gaelic | leabhar |
| Spanish | libro |
| Sranan | buku |
| Swahili | kitabu |
| Swedish | bok |
| Tagalog | aklát |
| Thai | หนังสือ |
| Turkish | kitap |
| Welsh | llyfr |
| West Frisian | boek |
| Yiddish | בוך |