Claims origins of PIE language is 2,000 years older than Yamnaya, and Yamnaya did NOT speak PIE
Learning PEI but also important things about languages: inflection, casing, etc: Start at https://youtu.be/kzP5Lq9fYi8?t=475
A Minimum but 'guaranteed' PEI words in english
Type 'search' and look for word in english
Great analysis of how words developed (umlaut) from PEI to Greek
Shows origins of words traced to proto-indoeuropean