I think my friend has intellectual disability. Should I tell him?

I don't think I should broadcast his symptoms willy-nilly, they are not the point of the thread. I'm asking an ethical(?) question.

When I suspected he is autistic, I told them without much hesitation. But given my pal's insecurities about his intellect and maturity, I'm afraid to approach the topic of additional and even more stigmatised disability.

He says he feels stupid and infantile all the time. What made me feel especially concerned and start this thread is what he perceives a job like a school where every wrong move of his will be punished instead of a two-way relationship with responsibilities on both sides. He says he's easily manipulated and bossed around. He's very, very self-aware of his vulnerabilities and feels like an easy target for exploitation because of his supposed "stupidity," social ineptitude, and poor memory among other things.

I want to help him give a name to his struggles and feelings and find support. This was the most important thing I got when I was seeking diagnosis of autism for myself. He immensely struggles with jobs and adult life in general. I'm not hopeful about our medical system too much, but maybe he'll be able to get disability benefits. They're not much, but it'd be a tremendous support for him while he builds his audience as an artist.

The cherry on top is that the term "intellectual disability" is known to a handful of people in my language. I'd probably have to use the r-slur to make it clear how our society understands the issue

I know I should be honest about it. While I'll absolutely tell him that the term is wrong and outdated, it'd still be a blow I imagine.

I'm really afraid of putting salt on an open wound like this. He'd still have to come to his own conclusions of course, but what should I do? And if tell him, how exactly?