I was trained to understand that illiteracy in English means someone that cant read or write, but if it was translated as-is, illiteracy means "iletrado" -> som

I was trained to understand that illiteracy in English means someone that cant read or write, but if it was translated as-is, illiteracy means "iletrado" -> someone "without letters" which in my mother language doesn't mean that someone cant read, but a broader category of people who cant read together with people who have very a poor language understanding and communication skills. Some illiterate 'iletrado'(for us) in some cases can read, but might not understand it very well. That might explain why the OP used the given word because in some languages its the definition that defines people who cant read.