Bell Beakers probably didn't even speak Indo-European.

[cmt160]

Nowadays, steppe admixture is the only reason that keep us believing the Beakers spoke an Indo-European language.
However, everything seems to be pointing to the contrary. IE languages spoken in present-day western Europe can be easily explained by later Unetice (Italo-Celtic) and Battle Axe phenomenons, both derived from Corded Ware. Basques, Iberians (the real ones, the Iberii) and Etruscans are and were pure descendants of the local Bell Beaker populace while later IE speakers of these areas shows clear post-Beaker Central European ancestry. And, above all, there is no concrete evidence of a Bell Beaker language anywhere in western Europe.

So what are your reasons to continue believing Bell Beakers spoke Indo-European?

Lusitanian language, which is a pre-celtic IE-descended language from the Iberian peninsula, most likely brought by bell beakers during their invasion of Neolithic Iberia in the bronze age. Got wrongly unofficially classified as "italic" in the past (actually it didn't, was just a hypothesis and they just left it officially unclassified) because they didn't take into the account the bell beakers who were the first ones who brought steppe admixture to Iberia. And even in the non-IE languages from pre-roman iberia (tartessian/iberian/vasconic-aquitanian) you can see clear IE influence in the language, most likely due to these pre-celtic IE-speaking bell beakers who invaded the entire peninsula and even if they didn't fully culturally assimilate the neolithic natives, they didn't just leave an impact in the genetics but also in the language of those who didn't speak the language of their fathers fully and rather maintained the neolithic language mostly although with some clear influences.


Here you can see the clear IE influence (most likely from the bell beakers like I said before) in the non-IE speaking iberian language from the mediterranean coast (which btw i think is on itself related to the basque language):

https://www.youtube.com/watch?v=6Q5FEjZ6Mi0

this guy in the comment section already pointed it out long ago