I think the story about Kumiko Tsuchida can be true because when you speak in a foreign language your pronunciation can be wrong and confuse people. Also you can’t understand what you say in a foreign language because you mastered the pronunciation. And, in English there are words that are pronounced alike but spelled differently and this can cause errors.
I never had any problem like this or I don’t like remember but, probably, somebody hadn’t understand me. There are things that you mind don’t like remember