Customizing messagest to different languages

Hello

I have customized the “Introduction” field of the Newsletter widget to Spanish, English and French. I wrote down into the field the following:

<br><!–:en–>Sign up for our latest news and offers<!–:–></br>
<!–:es–>Apúntate a nuestra Newsletter<!–:–>
<!–:fr–>Abonne à notre Newsletter<!–:–>

And it works.If my WordPress runs in French, the message is the second one, etc.

So, I’d like to do the same for the Error Page Content, Confirmation Required Message and so on, of the Newsletter subscription. I used the same tags, but it does not work. I am using the “qTranslate” widget for WordPress.

Thanks in advance for your help

Mike