Yes! There is so much to be done. Aphasia is the loss of language that is often seen after a stroke. Dysarthria is something that can happen after a stroke as well where articulation is negatively impacted because of weakness in the tongue. Apraxia is something that can happen after a stroke where words are not pronounced correctly but not because of a weak tongue. Without an evaluation, I cannot give you exactly what his direct problems are, however, you can look into the National Aphasia Association for resources and local support groups who do activities where he can practice speaking. Definitely see a speech language pathologist for an evaluation. There are exercises specific to each condition. Tactus Therapy has an application you can download to your tablet or phone where he could use visual demonstrations of people saying words, phrases, sentences, etc. and speak alongside with them. You can also use the Lumosity software, where he can perform exercises to find words he wants to say. You can buy Scattegory cards from Target and have him think of different category items. You can also find a list online of common opposites and see if he can come up with the opposites of different words. You can find empty comic strips and have him try and narrate them or explain them to practice producing words. There are many things he can do and I gave you a few ideas to start and application idea to download but I also recommend in addition to those, for him to see a speech language pathologist in his local area either private practice or telepractice.