Per a request from Apple, sites which have a large number of subdomains (like us) have a bug which causes the app to hang or crash when links are opened from Safari, Mail, etc. Apple has provided a way to wildcard these domains, but needs us to adopt them ASAP due to user complaints about failing links.

Note this is not specific to Wikimedia.

If we cannot wildcard all domains these should be prioritized (along with their m. variants)
www (portal)
en
es
fr
de
ru
it
ja