What language did Haplogroup I1-bearing peoples speak most frequently before Indo-European? I am looking for your own opinion and/or speculation based on what you know of the research. Nobody is going to be called out on the correctness of their answer.
If you believe that I1 peoples spoke dialects of one of the answers below that were sufficiently divergent to be considered separate but related languages, pick the category anyway. No nitpicking please, thanks!