Why is castelian spanish spoken with a lisp?

Castilian Spanish is not spoken with a lisp in the same way that some people in English might pronounce the "th" sound.

The "c" and "z" sounds in Castilian Spanish are pronounced differently from other varieties of Spanish. This difference is sometimes perceived as a lisp, but it's more accurate to describe it as a "ceceo" or "seseo".

Here's the breakdown:

* "C" before "i" or "e": In Castilian Spanish, this is pronounced like the English "th" in "thin".

* "Z": In Castilian Spanish, this is pronounced the same as the "c" before "i" or "e", like the English "th" in "thin".

For example, the word "caza" (hunt) would be pronounced "ka-tha" in Castilian Spanish, while in other varieties like Andalusian Spanish, it might be pronounced "ka-sa".

So, it's not a lisp in the traditional sense, but a different way of pronouncing certain sounds. This unique pronunciation of "c" and "z" is a characteristic of Castilian Spanish, the variety spoken in Spain and considered the standard dialect.