Dutch language analyzer in Elasticsearch

es_dutch.json

PUT ham
{
  "mappings": {
    "doc": { 
      "properties": { 
        "created": {
          "type": "date"
        },
        "title":    { 
          "type": "text",
          "fields": {
            "dutch": {
              "type": "text",
              "analyzer": "dutchy"
            }
          }
        }, 
        "description":     { 
          "type": "text",
          "analyzer": "dutchy"
        }
      }
    }
  },
  "settings": {
    "analysis": {
      "filter": {
        "dutch_stop": {
          "type":       "stop",
          "stopwords":  "_dutch_"
        },
        "dutch_kp_stemmer": {
          "type":       "stemmer",
          "language":   "dutch_kp"
        },
        "dutch_override": {
          "type":       "stemmer_override",
          "rules": [
            "calamiteiten=>calamiteit",
            "calamiteit=>calamiteit",
            "konijn=>lindelaan"
          ]
        }
      },           
      "analyzer": {
        "dutchy": { 
          "type":      "custom",
          "tokenizer":  "standard",
          "filter": [   
            "lowercase", 
            "dutch_stop",
            "dutch_override",
            "dutch_kp_stemmer"
          ]
        }
      }
    }
  }  
}

GET ham/_settings

PUT ham/doc/bla
{
  "title": "de artikeltje met vele calamiteiten, en grote zaken. scholen",
  "created": "2018-02-02T12:00:00"
}

PUT ham/doc/vla
{
  "title": "leentje leerde lotje lopen langs de lange lindelaan",
  "created": "2018-02-02T12:00:00"
}


GET ham/doc/bla/

GET ham/doc/bla/_explain 
{
  "query": {
      "query_string": {
          "query": "lotje",
          "analyzer": "dutchy"
        }
    }
  }
}

GET ham/_search?pretty
{
  "query": {
      "query_string": {
          "query": "konijn",
          "analyzer": "dutchy"
        }
    }
  }
}

GET ham/_analyze
{
  "analyzer" : "dutchy",
  "text" : "leentje leerde lotje lopen langs de lange lindelaan"
}