Depends heavily on which border, I think. I live in eastern Austria and don’t know any Czech, Slovak or Hungarian despite those countries being within an hour’s drive of where I live. For the most part I expect people in Austria to speak German, I don’t expect people even in border villages of Czechia, Slovakia or Hungary to speak German; if they do, that is a nice surprise.

Some years ago, in a border village in one of these countries, a child spoke to me in the local language; I tried speaking in German and English, but the child didn’t understand either, I could barely say “I don’t speak (your language)” in that language. Eventually I figured out he was trying to ask me how old I was, and I could show that on my fingers…