Thanks for your answers.
Some needed comments maybe:
These two regex are about dropcaps, but I have others...
FR1 is to deal with the first letter of a paragraph named
let (no indent). It begins after <p class="let"> and it creates a double span, finishing with </span></span> after the first capital letter.
FR2 specifies the number of words to use
after the first letter (here 4). It begins with the characteristic </span></span> and builds itw own span. I have both A et V styles with different margin-left values.
@theducks I took good note of your remark.
There is no quotemark problem at least for me. When I select a paragraph to have a dropcap, I make sure it begins with a capital letter. :firstletter anyway does not work with ADE so there is no automatic mode for this.
text sample coming...