It all depends on what you are looking for. Ultimately you are trading a credit risk (+ FX if you don't hedge).
For whatever reason I may be looking for that specific credit risk (which may not be available in my base currency), or the spread may be more attractive than in my base currency even after hedging (this happens regularly)
Edit: to answer your last question: usually by using forwards, although matching exact cashflows may be tricky, particularly if your looking to hedge FRNs)
Hope this helps