As you can, Irish was more popular in the West and South which was further away from Great Britain and especially England. This is also shown in the modern day boundaries of the Gaeltacht. Also, note that there is Irish-speaking areas in modern-day Northern Ireland.
Few countries know Russia as well as the Baltic states do. They were part of the Russian empire for centuries and were subjugated by the Soviet Union for 50 years. Around a quarter of Estonia’s people and 27% of Latvia’s are native Russian-speakers.