Its the first time I work with it,and I have no experience. I searched on doeums, but didnt found anything about this.
If I do changes to the data dict labels , how can I update it in production servers?
Imagine I add a new lang, french, and I translate all the dict, now I want to uodate my priduction system with this new lang
Interesting question. I have just started using the data dictionary and application language modules myself. I would think that if you add another language and do the translation that you just need to regenerate all your application and redeploy them to the production environment. I do not think that the dictionary as such is needed in the production environment, but I may be wrong as I have not come that far yet.
What I would like to avoid is to redeploy all the project
Well, perhaps one does not need to redeploy the whole project, but just all the applications. My experience is that even a deploy of all applications is quite fast compared to a full project deploy that also include all the SC files.
I suspect that the translations are merged into the generated application files, so there is no way around regenerating and redeploying it.