Earlier quoted context omitted.
As a non-native speaker of English, I have been wondering how much signal it would be appropriate for me to infer from the kind of sloppy grammar that is typical only for native speakers of English? [1] I learned English at school as a second language, and we would always start with the written form, and then learn how to pronounce. So my "hash table" is primarily organized based on the written form, and it would be…
This is interesting. On the other hand, I would like to know since Finnish as a language fascinates me: How common are noun-case errors among people who have a high school education? I mean something like using the elative case when the ablative might be more appropriate?
Nonexistent. I don't think even preschool children ever mix those. I don't have kids, so I can't say how it is with the kids who are just learning to speak.
Also in English, you don't see people mixing "into" and "onto" even remotely as often as the mistakes the linked article talked about.