Abstract The study examines the terminology currently in use for the higher-level subgroups of the Indo-European family tree. Based on the observation that the terminology is heterogeneous and confusing, the study discusses the central terms, suggesting that the whole language family and its ancestor should be referred to as “Indo-European” and “Proto-Indo-European” respectively. Under the hypothesis that the three first subgroups to branch off were Anatolian, Tocharian and Italo- Celtic, “Indo-Tocharian” is recommended as a suitable name for the non-Anatolian subgroup, and “Indo-Celtic” for the non-Anatolian and non-Tocharian subgroup.

中文翻译：

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印欧分支命名法

摘要 该研究检查了当前用于印欧系谱中更高级别亚组的术语。基于对术语异质性和混乱的观察，该研究讨论了中心术语，建议整个语言家族及其祖先应分别称为“印欧语系”和“原始印欧语系”。在假设三个最先分支的亚群是安纳托利亚、吐火罗和意大利-凯尔特人的情况下，建议将“Indo-Tocharian”作为非安纳托利亚亚群的合适名称，将“Indo-Celtic”作为非安纳托利亚和意大利的亚群的合适名称。非吐火罗亚群。