| Part of speech | common noun |
|---|---|
| Pronunciation | /lœɪ̯s/ |
| Hyphenation | luis |
| Plural | luise |
| Diminutive | |
|---|---|
| Singular | Plural |
| luisie | luisies |
| Catalan | poll |
|---|---|
| Chinook Jargon | inəpʰu |
| Czech | veš |
| Danish | lus |
| Dutch | luis |
| English | louse |
| English (Old English) | lus |
| Esperanto | pediko; homlaŭso |
| Faeroese | lús |
| French | pou |
| German | Laus |
| Hawaiian | ʻuku |
| Italian | pidocchio |
| Latin | pedis; pediculus |
| Luxemburgish | Laus |
| Malay | kutu |
| Norwegian | lus |
| Papiamento | pieu |
| Polish | wesz |
| Portuguese | piolho |
| Russian | вошь |
| Saterland Frisian | Luus |
| Scots | loose |
| Scottish Gaelic | mial |
| Spanish | piojo |
| Sranan | loso |
| Swedish | lus |
| Tagalog | kuto |
| Turkish | bit |
| Welsh | lleuen |
| West Frisian | lúd; lûs; lús; biter |
| Yiddish | לױז |