I just use the Mac’s US layout and type accented characters using Alt. (Alt+c=ç, Alt+n=ñ, plus a few other combos to get the grave, acute and umlaut). Works for Portuguese (my native language), Spanish, French, and what little German I need.<p>Trying to optimize beyond QWERTY might be appealing, but I’ve found the trade-off of having to set up layouts everywhere when using multiple machines to be annoying, plus application key combos are usually designed for QWERTY.