Exactly. I spoke about comments only. I can turn blind eye on occasional non-English comment or short note here and there. But naming variables and functions in local language is an inexcusable sin. I am from small country of Czechia with 10 mil people. Naming function in Czech is utterly stupid. Even if you’re sole developer, there’s a good chance you’ll want to paste a snippet to stackoverflow, sooner or later have a collaborator from nearby Ukraine or Pakistan (very common), or god forbid! - your product will be so successful someone will want to buy it. Good luck if the code base is littered with language nobody speaks :-)