I would like to revive the idea from Issue
#7766 and propose that "yaml" be added to the list of repository language.
We are using bitbucket to version control our aws cloudformation templates in YAML. Im sure we are not the only ones.
I feel that YAML and JSON should be valid options in the repository language options in Bitbucket.
An argument against this was made in 2013 saying that YAML was a Markup Language and not a real programming language, but so is Markdown, and it's in the list of options for Repository Language.