| Part of speech | common noun |
|---|---|
| Hyphenation | i·so·toop |
| Catalan | isòtop |
|---|---|
| Danish | isotop |
| Dutch | isotoop |
| English | isotope |
| Esperanto | izotopo |
| Finnish | isotooppi |
| French | isotope |
| German | Isotop |
| Italian | isotopo |
| Latin | isotopus |
| Norwegian | isotop |
| Portuguese | isótopo |
| Russian | изотоп |
| Saterland Frisian | Isotop |
| Spanish | isótopo |
| Swahili | isotopi |
| Swedish | isotop |
| Thai | ไอโซโทป |
| Welsh | isotop |