Hello, how are you doin' ?
Fine thanks 
Houston, we have a problem...
Sorry, for tonight NASA HQ has been relocated in Cholet, West of France 
When I use the <multi> tag inside "[(#NONONO)]", like this:
[<p><span class="azul"
style="font-weight:bold;"><multi>[pt_br]Realização
[es]Realización</multi>:</span> (#CHAPO)</p>]
The "" appear in the website. I think it's because of the "[pt_br]" and
"[es]".
Normal ! I'm not sure those tags can be nested that way ( [ ...[ ... ] ...
] ) I got problems each time I've tried.
Is there some way to solve this problem?
There are 2 ways indeed :
The "not so clean one" :
A way to solve, not really but a way to bypass it :
If you are sure to use your #CHAPO each time you write a new article, you
can try the following syntax :
<p><span class="azul"
style="font-weight:bold;"><multi>[pt_br]Realização
[es]Realización</multi>:</span> [(#CHAPO)]</p>
It will work.
The only difference is that if you do not use any #CHAPO in your article,
you will see the word "Realisation :" (its translation, indeed) appearing
with nothing behind the ":"
Then, just think about the harmful aspect (if ever it is). You can also
see this as a way to lead your contributors to fill this field every time,
if they do not want to see a lone single word with nothing written after.
The second way aka "the cleaner one" :
You may use tags like <:realisation:> which are much more contextualizable
than the <multi> ones, and for which you just have to set the translations
in your pt_br and es public_xxx.php language files.
[<p><span class="azul" style="font-weight:bold;"><:realisation:> :</span>
(#CHAPO)</p>]
I think that's even cleaner than <multi> tags
for the public_xxx.php files, you'll get them in /ecrire/lang, but you can
also copy/paste them in your /squelettes directory if you want to restrict
the use of your translated words to one template pack at once.
'Hope it will help. Don't hesitate to ask for further help if needed.
Thanks in advance. =)
You're welcome 
Good luck.
Etienne B.
(aka Loiseau2nuit, back on the network again... At Last !!! )