How does senku understand people in ishigami village
Ok so since it takes 3,000~ years in the future the Japanese the people of ishigami village spoke would have completely change and since even small settlements over 100 years have had language change a lot but I understand a language can be preserved a long time but over 3,000 years in doubt so, and I they seem in the anime to be an orally culture and that would make passing down Japanese hard and also with like some characters from the Soyuz speaking different languages like Russian and English that also could have tricked in.
Even though i know it just something to make it easier to voice and it's not very important it's nice to think how the language could change.