Mine (entirely unreasonable) are:
When people say "hew-mous" instead of "houmous"
When people say "choritzo" or "choritho" instead of "chorizo". As someone who is half Spanish, yes I know it should have a "th" sound but if you're not also rolling the r it just sounds absurd.
When people in FB groups write "chock" in place of "choke". I see this all the time and I don't get how or why!!!
I daresay I have mine too: my mother told me the other day that I was saying "bald" as "bold".