How to support a new hire with a stutter?

How to support a new hire with a stutter? I work as a project manager in a small company in Germany. We've recently interviewed and hired a new employee who stutters. This employee will start work in a few months, and I have some questions about how my company can make the work environment more supportive and welcoming for this new hire. 1. Although we are based in Germany, all work is conducted in English, which is not my mother tongue. Is there any language that we should be aware of that is not appropriate anymore? For example, I used the phrase "speech impediment", and the word "stuttering" internally with my coworker when discussing the interview, but I am not aware if these terms are outdated, or if there are other preferred terms. 2. Would it be appropriate to inform other staff members of the new hire's stutter before their start date? I would like everyone to be prepared on how to be accommodating, but I also don't want to create a situation of singling this person out. 3. Are there any things that we could do or that we should be aware of to ensure a smooth onboarding and a welcoming work environment? Thank you in advance!