Yerin,idk if this is too personal,so if it is please ignore me TT but you said you had speech problems when you were younger... what kind of problems and how did you solve them? because my brother has some speech problems too and he's getting better but i just want to know as much and ways to help him more :)
Don’t worry, it’s not too personal! I don’t know if I had a specific condition, but basically I had trouble pronouncing a lot of sounds like a hard “r”, “s”, “th”, and many (many) other sounds, and a bit of a lisp, but that part might’ve been from my bad teeth. Once I got them fixed up and got my braces off, it got a bit better thankfully. I did speech therapy at my elementary school starting when I was in kindergarten till 5th grade. Originally they weren’t going to let me enroll until around 3rd grade since my kindergarten teacher said when asked about my speech “I don’t know if she has issues since she doesn’t talk much.” (like why do you think I don’t talk much? I can’t talk properly! Anyways…)
Since my parents didn’t want me to wait that long, I went to a private speech therapy place to get some tests done (which is very helpful btw) and we gave the results to the school and they let me take speech therapy. I did both school and out of school therapy for a year or two then just did the school one. It helped a lot, although sometimes I slip up when I talk and the slight lisp and mispronunciation comes up again. To talk clearly I mostly try to exaggerate the shape of my mouth for different sounds (round for “o”, etc) and talk a bit louder. Also, you know when you get happy or excited and you talk with a higher register? I try not to do that unless I’m so happy it doesn’t matter haha, that way people can hear me better.
Basically a lot of focus helps, and eventually it becomes more of a habit than something to really concentrate on. Also good teeth, if he needs his teeth fixed up don’t hesitate if your financial situation is good :) It might take a while for his speech problems to mostly fade away, but hey, Ed Sheeran had a stutter, my dad’s friend is a successful, bilingual business man with a severe stutter, and Winston Churchill had a lisp AND a stutter!
I hope I helped! It’s inevitable that sometimes people might be rude and tease him even if he’s talking fine, so help him keep his confidence too. Speech problems don’t have to be a serious and frustrating thing, sometimes it’s fun to make light of it too and it’s important to stay positive about improvement. You’re really sweet to care about your brother like this, it’ll really help him to have more support!