In Poland it is generally assumed that a programmer knows English, most of the companies here are just branches of companies from other countries (not only US/U

In Poland it is generally assumed that a programmer knows English, most of the companies here are just branches of companies from other countries (not only US/UK based) and to communicate we use English as a common ground. Another factor to consider is that if we write in language that has some constructs (e.g. C - if/then/else/while/return/int/double/class/void etc.) then writing: if (znalezione) { ... } looks awkward. Also one has to consider popular libraries and functions/methods/classes in them are English based, so this would add even more awkwardness to the code: zwierzęta.stream() .filter(z -> z.kończyny().contains(noga)) .map(z -> z.toString()) .collect(Collectors.toList());