| interlingua | ina-000 |
| inefficiente | |
| العربية | arb-000 | خائب |
| বাংলা | ben-000 | অসফল |
| English | eng-000 | ineffective |
| English | eng-000 | ineffectual |
| English | eng-000 | inefficacious |
| English | eng-000 | inefficient |
| français | fra-000 | inefficace |
| Gaeilge | gle-000 | mí-éifeachtach |
| Srpskohrvatski | hbs-001 | neefikasan |
| interlingua | ina-000 | inefficace |
| italiano | ita-000 | inefficace |
| italiano | ita-000 | inefficiente |
| Nederlands | nld-000 | ineffectief |
| polski | pol-000 | nieskuteczny |
| português | por-000 | ineficaz |
| español | spa-000 | ineficaz |
| Türkçe | tur-000 | etkisiz |