At Sheffield, European and East Asian languages are taught in different departments. You could do BA Modern Languages and Cultures, which includes Russian, or you could do BA Korean with Japanese, but I don't think you can combine them. You could check that with the uni, though.
Last year BAMLC and some East Asian courses were definitely in clearing. I can't remember which ones and obviously that's no guarantee they will be this year. BA Korean with Japanese doesn't require language A-levels. BAMLC says it typically requires A-level languages but can consider language GCSEs too. If you're interested it's probably worth applying although obviously nobody can guarantee whether you'd get accepted or not.