I need help with the dictionary on my Samsung Galaxy Note 10 plus

I speak to my phone a lot and my new phone is worse than my old phone at picking up my voice and getting the words right but both phones were terrible however whenever I say the word bad (badd) it puts 2 d's and I want to fix that in the dictionary I don't know why it is doing that it is very strange if you know how to fix it in A new Samsung phone let me know I have no clue how to fix this problem and I would like to know so that if I find other spelling problems in the future I can fix them