Note: While a question similar has been suggested and the replies indicate that even uneducated Russians do not make mistakes as even educated English speakers tend to, I am firstly not convinced this is true and secondly, if it is true (and can be substantiated) what is the reason for this? Could, for example, it be the case that English speakers make the "I/Me" sort of mistakes because declension is such a minor part of English whereas it is a huge part of Russian and therefore Russian speakers have a better understanding of the concept of case?
I frankly find it hard to believe that "I/Me" mistakes are limited to English, but if this is true, I would like to understand why this is.
It is very common in English to use "me" instead of the correct "I" and vice versa -- similar with "who" and "whom" etc.
I am asking if such errors happen more frequently in Russian, for example, which has more complex declensions or perhaps because declension is more common in that language, native speakers are in fact less likely to mix up cases.