Hi: org-mode odt exporter are using 'org-odt-styles-file, which are odt templetes, I think latex exporter should do like this. for example:
org-latex-styles-file or org-latex-templete-file we can include many different language's templates into org, and no need touch the ox-latex.el and the user can write theirs template easily, we can use "locale" to determine which template will be used converting latex fragements can use templates too, like: org-latex-fragment-templete-file --
