此模板用於標記原始印歐語，如：''{{PIE|rēḱs deiwos-kʷe}}'' → rēḱs deiwos-kʷe
如上所示，此模板並不會使內容自帶斜體，故斜體須由編者自行加在模板外側。
包在此模板內的文即使遇到空格也不會換行。若此模板中包含的字數較多時，可以使用|wrap=normal使文字自動換行。
關於原始印歐語之後的其他原始語言，可以使用{{lang}}加上ISO 639-2代碼：
ine – Indo-European (Other)bat – Balticcu – Old Church Slavonicsla – Slavicorv – Old East Slavicnon – Old Norseang – Old Englishgot – Gothicxvn – Vandalicgoh – Old High Germanfrk – Old Frankishgem – Germanicsa – Sanskritinc – Indicpeo – Old Persian
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xme – Medicxbc – Bactrianxsc – Scythianira – Iranianxum – Umbrianxve – Veneticxfa – Faliscanfro – Old Frenchroa – Romancexlp – Leponticxpi – Pictishxce – Celtiberianxcg – Cisalpine Gaulishxtg – Transalpine Gaulishxga – Galatian
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sga – Old Irishcel – Celticxcl – Classical Armenianhit – Hittitexlu – Cuneiform Luwianxlc – Lycianxld – Lydiangrc – Ancient Greekgmy – Mycenaeanxmk – Macedonianxpg – Phrygianxdc – Dacianxto – Tocharian Atxb – Tocharian B
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ISO_639:x
