Q:

Move address to the right and recipient to the left in a letter

I wanted to try to write letters in LaTeX but the problem about the layout of the letter is the fact that the sender's address is on the left and the recipient on the right but in French it is supposed to be the opposite. I wanted to know if it was possible to change that. I tried to use the babel package but it didn't change anything. This is the preamble of the document.
\documentclass[12pt,a4paper]{letter}
\usepackage[utf8x]{inputenc} \usepackage{ucs}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\address{my address} 
\signature{my name} 

A:

Texmaker is only an editor and so it has nothing to do with the typesetting, which is done by the letter class.
The letter class is quite primitive and modeled on typical US commercial letter style. You probably want to look at the lettre class that specifically designed for French style letters.

