Thank you for your reply,
I found it to be most enlightening and took the time to read through your links and on DSLs.
As I studied language theory and had to come up with a toy one I kinda related to different posts I found online warning people against DSLs.
I have three follow up questions on that topic.

• Beside the easily found example that I felt only scratched the surface, how spread is the use of DSLs?
• Furthermore, when taking into account the difficulty of designing and maintaining a language (I found grammar and syntax to be complicated to do well, but it might just be me) why not use pure lua to script your application?
• What are some good ressources on the most maintainable design patterns used when you need to come up with an architecture for supporting user written addons? (I read Module::Pluggable documentation's but I could not think of a way to make it able to directly use lua scripts without having to wrap each of them in a perl module