We have some employees who frequently communicate with customers. These employees are native English speakers and yet somehow their written communications come across as though they really struggle with the language. It is difficult, because many sentences do not make sense in the body of a communication. I'm not talking about incorrect uses of there and their (although that also happens). The main issue, other than unclear information being disseminated is that we cannot have them help with online product content for their accounts (which we need to do), because we are not confident in their written skills.
What is the most tactful and respectful way to let a colleague know that when they type emails and other written communications, they need to use more care.
What techniques have others used that were helpful?
In terms of verbal skills, there are no issues. It just seems like they are trying to fly through things too quickly, perhaps, and frequently use some flourishes that just do not make sense. This is a regular issue that really needs to be addressed, not one email out of 100 - it is almost everything they type. I am not their manager, but they work on things for my department, so I don't want it to feel like a reprimand by going to their boss about it. Just looking for friendly ways to say "You need to proof read what you're sending".