An English person would not say 'fits' here. I would use 'suits'.
Yes, "fits" is simply wrong, in U.S. English too.
An American would say "we can eat whenever you want"
That was my answer, too, and it was not accepted
Where's the progressive aspect here?
You're right. I guess this is a bonus question :)
"We can eat whenever's convenient for you." should be accepted
Agree use "..that suits you.." not "...that fits you.."
What a silly sentance translation