Dear Amy: I have a co-worker who has terrible grammar. Sure, we all make grammar mistakes from time to time, but his is really bad all the time and people are starting to laugh at him or make glances to other team members about it when he makes presentations. I believe English is his first and only spoken language (we all have our spoken languages documented in case a customer requires specific language help). However, I don’t think anyone corrects him. I don’t know him very well, but he is in my business circle.