http://terminology.hl7.org/CodeSystem/v3-LanguageAbilityProficiency|2018-08-12

{
  "description" : " A value representing the level of proficiency in a language.  Example:\\r\\nExcellent, good, fair, poor.  OpenIssue:\\r\\nDescription copied from Concept Domain of same name.  Must be verified.",
  "compose" : null,
  "package" : "hl7.fhir.r4.core@4.0.1",
  "date" : "2018-08-11T14:00:00Z",
  "meta" : {
    "lastUpdated" : "2018-08-12T00:00:00.000+10:00"
  },
  "publisher" : "HL7, Inc",
  "content" : "complete",
  "name" : "v3.LanguageAbilityProficiency",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "v3 Code System LanguageAbilityProficiency",
  "supliment" : null,
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode" : "external"
  }, {
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger" : 0
  } ],
  "status" : "active",
  "hierarchyMeaning" : "is-a",
  "id" : "66a8892c-300c-53e6-83c0-aa5ebaa6ddbd",
  "valueSet" : "http://terminology.hl7.org/ValueSet/v3-LanguageAbilityProficiency",
  "url" : "http://terminology.hl7.org/CodeSystem/v3-LanguageAbilityProficiency",
  "identifier" : [ {
    "value" : "urn:oid:2.16.840.1.113883.5.61",
    "system" : "urn:ietf:rfc:3986"
  } ],
  "concept" : [ {
    "code" : "E",
    "display" : "Excellent",
    "definition" : "Excellent"
  }, {
    "code" : "F",
    "display" : "Fair",
    "definition" : "Fair"
  }, {
    "code" : "G",
    "display" : "Good",
    "definition" : "Good"
  }, {
    "code" : "P",
    "display" : "Poor",
    "definition" : "Poor"
  } ],
  "caseSensitive" : true,
  "version" : "2018-08-12",
  "contact" : [ {
    "telecom" : [ {
      "value" : "http://hl7.org",
      "system" : "url"
    } ]
  } ]
}