Ahem, dumb question, what is WML? The acronym appears to be ambiguous, probably you mean https://en.wikipedia.org/wiki/Wireless_Markup_Language? WLM is mentioned in https://www.mediawiki.org/wiki/Extension:MobileFrontend#API but would use an explanatory link; other than that the wiki doesn't know much about it. https://www.mediawiki.org/wiki/Special:Search/WML
Nemo