I work in the software development industry and this is the first formal job of this person. They have particular personal reasons to have bad writing and speaking skills, mainly due to bad education access during a huge part of their life.
While the communication of this person is not bad at all (they can ask questions, ask for feedback, give feedback, complete tasks), it is clear that the lack of a more complex vocabulary and especially the amount of incorrectly written words in their messages are seriously hurting their ability to improve as a professional.
Particularly I find it a bit unprofessional to bring up this topic during the annual performance review (this person is not below the expectations of the position), but I truly believe that improving on those skills will bring much more value than studying software development and technology for example. By better studying the language I'm sure this person will be able to have a much better understanding of what they need to do and how to better express themselves during necessary situations.
This feedback was brought up by me but we have received feedback from other members of the team as well, so it is not something that concerns only me.
So the question is: is it plausible to include this topic in this person's performance review? And if so, should I also provide educations resources to help this person to improve?