There are many options, depending on your hardware, software, languages, and personal preferences. You can use your OS settings to set up different keyboards, without having to buy any additional hardware — but you’ll need to familiarize yourself with the new layout. You may be able to set up an “international English” keyboard, which would be what you’re used to but with relatively easy ways to get international characters. Or, you could set up a Spanish keyboard (do an image search to see what you’ll be getting). A Spanish keyboard obviously facilitates typing in Spanish, as well as Catalá (more accents, letters like ç, and you can even type “paral·lel”), Galego, French and other Latin languages. You can even use the dieresis to fake an umlaut for German (actually, I think the character is the same). BTW, I use the Spanish keyboard for typing French, because the French one rearranges some of the letters. A good option for English speakers learning French is the Canadian French keyboard, since it’s the same as an English keyboard but with easy access to French diacritics.