Answer to: How Far Would You Go to Accommodate non-Verbal Colleague?

at some point someone has to draw a line You don't get to draw the line, his management chain do. And they have drawn a public line (whatever might be going on in private) which says that they find his work acceptable, support him and it's up to you to find ways to work with him in order to progress. Trying to sidestep the appointed gatekeeper would not be appreciated in any scenario, and more so if the only reason for that sidestepping was that you can't accommodate his disability when everyone else can. You say that you can converse on Slack - why is that not a workable solution for conversations with multiple participants? Have you asked or observed how other employees adapt in order to work with him? The simplest answer is to do what they do.