| (subclass IndoEuropeanLanguage LanguageFamily) | Languages.kif 6710-6710 | |
| (subclass AlbanianLanguage IndoEuropeanLanguage) | Languages.kif 6717-6717 | |
| (subclass ArmenianGroupLanguage IndoEuropeanLanguage) | Languages.kif 6816-6816 | |
| (subclass BalticLanguage IndoEuropeanLanguage) | Languages.kif 6903-6903 | |
| (subclass CelticLanguage IndoEuropeanLanguage) | Languages.kif 6965-6965 | |
| (subclass GermanicLanguage IndoEuropeanLanguage) | Languages.kif 7105-7105 | |
| (subclass GreekGroupLanguage IndoEuropeanLanguage) | Languages.kif 8511-8511 | |
| (subclass IndoIranianLanguage IndoEuropeanLanguage) | Languages.kif 8647-8647 | |
| (subclass ItalicLanguage IndoEuropeanLanguage) | Languages.kif 9361-9361 | |
| (subclass SlavicLanguage IndoEuropeanLanguage) | Languages.kif 10691-10691 |
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