My voice is QUITE flexible I may look funny while trying to do voices like Yoda or a lisp.
I can do certain speech impediments as well.
I am an accent sponge if I sit in a room for a while with someone who is doing an accent I absorb it. not even intentionally but I can do that accent from then on.
I know a bit of Spanish so If I do a Latino character I can throw in some Spanglish.