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Proto-Indo-European is the ancestor of all Indo-European languages.

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SUPPORTED
the evidence backs this
Recorded sources
8 sources for · 1 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that Proto-Indo-European is the ancestor of all Indo-European languages?

Yes. Multiple reference works state directly that Proto-Indo-European is the reconstructed common ancestor of the Indo-European language family, and a linguistics Q&A likewise calls it the single reconstructed most recent common ancestor of all languages in that family. One scholarly volume instead argues the ancestor of all Indo-European languages including Anatolian should be called Proto-Indo-Anatolian, with PIE ancestral only to the non-Anatolian branches.

Verdict: SUPPORTED · 8 sources for, 1 against · Last checked

Evidence for · 8
Proto-Indo-European language - Wikipedia
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Proto-Indo-European language - Wikipedia. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Proto-Indo-European_language

Evidence against · 1
The Precursors of Proto-Indo-European
2019
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Kloekhorst, A. & Pronk, T. (2019). The Precursors of Proto-Indo-European. play.google.com. https://play.google.com/store/books/details?id=Fvb7EAAAQBAJ&source=gbs_api

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More for · 7
Indo-European languages
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Indo-European languages. (n.d.). en.wikipedia.org. https://en.wikipedia.org/wiki/Indo-European_languages

Simple English Wikipedia: Indo-European
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Simple English Wikipedia: Indo-European. (n.d.). simple.wikipedia.org. https://simple.wikipedia.org/wiki/Indo-European

What is the relationship of Proto-Indo-European, Indo-European, Proto-Germanic and Germanic?
2020
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What is the relationship of Proto-Indo-European, Indo-European, Proto-Germanic and Germanic?. (2020). linguistics.stackexchange.com. https://linguistics.stackexchange.com/questions/35783/what-is-the-relationship-of-proto-indo-european-indo-european-proto-germanic-a

Wikiversity: Classical Mythology/Indo-Europeans
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Wikiversity: Classical Mythology/Indo-Europeans. (n.d.). en.wikiversity.org. https://en.wikiversity.org/wiki/Classical_Mythology/Indo-Europeans

Could Greek and Italic share a same Indo-European substratum?
2015
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Could Greek and Italic share a same Indo-European substratum?. (2015). inria.hal.science. https://inria.hal.science/hal-01256310v1

Comparative Linguistic Analysis of German and Pashto: Exploring Structural, Phonological, and Historical Similarities Between Two Indo-European Languages
2026
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Zahid, H. (2026). Comparative Linguistic Analysis of German and Pashto: Exploring Structural, Phonological, and Historical Similarities Between Two Indo-European Languages. zenodo.org. https://doi.org/10.5281/zenodo.18752071

Origin of the Words Denoting Some of the Most Ancient Old World Pulse Crops and Their Diversity in Modern European Languages
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Origin of the Words Denoting Some of the Most Ancient Old World Pulse Crops and Their Diversity in Modern European Languages. (n.d.). doi.org. https://doi.org/10.1371/journal.pone.0044512

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