Also - diacriticials. This works fine in English, but pretty much every other place that uses the latin alphabet needs to use some kind of extra marks - even if we ignore the ones that are basically de-facto unused these days.... but in spanish the ´ is rather importnat to indicate emphasis and hence meaning or past tense, the ¨ is used occasionally, and n and ñ are two different letters, rather important if you want to be saying "happy new year" instead of "happy new anus" (año = year)

perhaps an alternate version for different languages? Spanish should be easy considering we only have to take into account ´ and ¨ as a diacritical - the rest "ll" and 'ñ' are taught in school as separate and distinct letters in the alphabet (as htey relate directly to pronunciation, no exceptions- ll is always a y, ñ is always like "ny" - not sure about the ¨ - it's not used often, and the difference is subtle - though possibly important - common in people's names I think, where you'd want to get it right. - have to look it up.