> some use Russian or transliterated Russian (mixing it with some English) liberally so it's not uncommon to see something like `log.Error("Дом не найден %s, %s: %s", ulica, nomerDoma, responseText) /* TODO: Добавить поиск лучшего совпадения */` in their code.

This gives me nightmares of dealing with an old patched Joomla install, where the developers had managed to bring in plugins etc. that used multiple inconsistent encodings in comments, so you could get all of the code to render correctly with any single terminal setting.