Merge branch 'knowsLanguage' into 'develop'

Uses a supported field for languages.

See merge request !1

librehost.json

@@ -7,7 +7,7 @@
     "homeUrl" : "https://librehoster.example",
     "logo" : "https://librehoster.example/logo.png",
     "description": "libre service provider",
-    "communicationLanguages": ["en", "fr", "nl"],
+    "knowsLanguage": ["en", "fr", "nl"],
     "contactUrl": "https://librehoster.example/contact",
     "privacyPolicyUrl" : "https://librehoster.example/policy/privacy",
     "termsOfServiceUrl" : "https://librehoster.example/policy/tos",