Some SHACL Examples

Hello

I am trying to write SHACL Shapes for
https://github.com/FranckCo/Stamina/blob/master/doc/xkos-best-practice.md.
And I am struggling :-)
I would be particularly interested to see examples (in
https://www.w3.org/wiki/SHACL/Examples, maybe ?) of how to define the
following :

   - How to check that the values of skos:notation do _not_ have a language
   tag ? (maybe by saying they have xsd:string datatype ?)
   - How to check that skos:prefLabel must have at least one value with
   language @en, but others can exist as well with a different language ?
   (maybe using sh:zeroOrMorePath ?)
   - How to check that every value of skos:prefLabel must have a language
   (whatever the language) ? (maybe checking that the datatype is
   rdf:langLiteral ?)

Thanks !

Thomas
-- 

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