They all use. ABrowser don't use the myspell, but hunspell. And if I
understand well, when the hunspell file is not found they search for the
myspell file.
myspell-pt is already installed when you installed the language, so it is not
a problem here. Some hunspell packages copy the dictionary into the myspell
package in order to have some compatibility (like the hunspell-fr-gu).
I never learned how to create a deb package from a binary package. I will try
to create the .deb package (I just ask myself why this hasn’t already been
created on the Ubuntu community,