YAML internationalization

I'm working in a big project.I'm thinking of a new idea to create the best way of internacianalization to many languages.

Solutions:

• 1.Store data as arrays - tree file system.. It's not a good way because i need to modify files "on air".
  


• 2.I18n table.All translations have a common table or relative tables.(Queries to database + database cache)
  


• 3.YAML(it's new for me)
  

I am reading about YAMl documentation and I like this structure..I suggest the 3rd solution. I would like to hear your opinions/suggestions.

Thank you in advance.