docs: Multilingual documentation for frontmatter params
docs: Multilingual documentation for frontmatter params

Fixes #2990

gohugoio/hugo,mitchchn/hugo,mdhender/hugo,digitalcraftsman/hugo,mdhender/hugo,mitchchn/hugo,digitalcraftsman/hugo,fedelibre/hugo,anthonyfok/hugo,mdhender/hugo,anthonyfok/hugo,fedelibre/hugo,anthonyfok/hugo,fedelibre/hugo,gohugoio/hugo,gohugoio/hugo,mdhender/hugo,fedelibre/hugo