Originally Posted by wallcraft
Spanish is included in cp1252, so if you have tried cp1252 and utf-8 I'm not sure what else to suggest. Other possibilities include macintosh for Mac OS Roman and IBM's cp850. I don't know if Calibre will recognize these code sets though. See Western Latin character sets (computing)
. It probably is worth trying macintosh at least.
it doesn't seem to work. i also put the epub file on my ipod touch and those question marks still appear instead of certain letters. if it was limited to only one letter or caracter i could read but there are too many and it is hard to read.