During my last job, on my first project, my boss showed some feedback from a client on a mockup. One of the things the client pointed out was that one of the feedback messages on the mockup had a pretty serious spelling mistake (for those that know their Dutch conjugation: a DT-error).

However, this mistake was not actually a spelling mistake. There was some confusion about the tense I used on the verb in the Dutch message: I used the present perfect, but the client thought I used present simple. I'll post the specific error in a modified form in a comment, in Dutch. I explained this to my boss, who decided that I should just rewrite the sentence to avoid further confusion.

Seeing the recent question about https://workplace.stackexchange.com/questions/60857/what-to-do-when-a-new-employee-makes-basic-spelling-and-grammar-mistakes reminded me of this situation, and it got me wondering how this similar situation should be handled. In this case, there isn't actually a mistake, but the client thinks there's one.

What is the appropriate action in this case?