Accept Language Header changes order of results

[mrosendorff]

Hi

It seems changing the accept language changes the order of priority of the results.

Steps to reproduce:

Download the latest full world data

wget -O - https://download1.graphhopper.com/public/photon-db-latest.tar.bz2 | pbzip2 -cd | tar x

run the server

E.g:

When running

curl 'http://localhost:2322/api?q=52%207th%20avenue%20highlands%20north&lon=28&lat=-26&limit=2' \
  -H 'Accept-Language: en'

it returns

{
    "features": [
        {
            "geometry": {
                "coordinates": [
                    28.0809321,
                    -26.1448506
                ],
                "type": "Point"
            },
            "type": "Feature",
            "properties": {
                "osm_id": 595642546,
                "extent": [
                    28.0774512,
                    -26.1433878,
                    28.0866907,
                    -26.1457578
                ],
                "country": "South Africa",
                "city": "Johannesburg",
                "countrycode": "ZA",
                "postcode": "2001",
                "locality": "Highlands North",
                "county": "City of Johannesburg Metropolitan Municipality",
                "type": "street",
                "osm_type": "W",
                "osm_key": "highway",
                "district": "Johannesburg Ward 74",
                "osm_value": "residential",
                "name": "7th Avenue",
                "state": "Gauteng"
            }
        },
        {
            "geometry": {
                "coordinates": [
                    28.030820100589064,
                    -26.145169799999998
                ],
                "type": "Point"
            },
            "type": "Feature",
            "properties": {
                "osm_id": 640375958,
                "extent": [
                    28.0307452,
                    -26.1451041,
                    28.030895,
                    -26.1452356
                ],
                "country": "South Africa",
                "city": "Randburg",
                "countrycode": "ZA",
                "postcode": "2132",
                "locality": "Parktown North",
                "county": "City of Johannesburg Metropolitan Municipality",
                "type": "house",
                "osm_type": "W",
                "osm_key": "building",
                "housenumber": "52",
                "street": "7th Avenue",
                "district": "Johannesburg Ward 117",
                "osm_value": "yes",
                "state": "Gauteng"
            }
        }
    ],
    "type": "FeatureCollection"
}

Whereas if you leave the accept language off i.e.

curl ''http://localhost:2322/api?q=52%207th%20avenue%20highlands%20north&lon=28&lat=-26&limit=2" 

it moves the Highlands North result to position 3

{
    "features": [
        {
            "geometry": {
                "coordinates": [
                    28.030820100589064,
                    -26.145169799999998
                ],
                "type": "Point"
            },
            "type": "Feature",
            "properties": {
                "osm_id": 640375958,
                "extent": [
                    28.0307452,
                    -26.1451041,
                    28.030895,
                    -26.1452356
                ],
                "country": "South Africa",
                "city": "Randburg",
                "countrycode": "ZA",
                "postcode": "2132",
                "locality": "Parktown North",
                "county": "City of Johannesburg Metropolitan Municipality",
                "type": "house",
                "osm_type": "W",
                "osm_key": "building",
                "housenumber": "52",
                "street": "7th Avenue",
                "district": "Johannesburg Ward 117",
                "osm_value": "yes",
                "state": "Gauteng"
            }
        },
        {
            "geometry": {
                "coordinates": [
                    28.030818873512054,
                    -26.145538199999997
                ],
                "type": "Point"
            },
            "type": "Feature",
            "properties": {
                "osm_id": 640375957,
                "extent": [
                    28.0306882,
                    -26.1454305,
                    28.0309495,
                    -26.1456459
                ],
                "country": "South Africa",
                "city": "Randburg",
                "countrycode": "ZA",
                "postcode": "2132",
                "locality": "Parktown North",
                "county": "City of Johannesburg Metropolitan Municipality",
                "type": "house",
                "osm_type": "W",
                "osm_key": "building",
                "housenumber": "52A",
                "street": "7th Avenue",
                "district": "Johannesburg Ward 117",
                "osm_value": "house",
                "state": "Gauteng"
            }
        },
        {
            "geometry": {
                "coordinates": [
                    28.0809321,
                    -26.1448506
                ],
                "type": "Point"
            },
            "type": "Feature",
            "properties": {
                "osm_id": 595642546,
                "extent": [
                    28.0774512,
                    -26.1433878,
                    28.0866907,
                    -26.1457578
                ],
                "country": "South Africa",
                "city": "Johannesburg",
                "countrycode": "ZA",
                "postcode": "2001",
                "locality": "Highlands North",
                "county": "City of Johannesburg Metropolitan Municipality",
                "type": "street",
                "osm_type": "W",
                "osm_key": "highway",
                "district": "Johannesburg Ward 74",
                "osm_value": "residential",
                "name": "7th Avenue",
                "state": "Gauteng"
            }
        }
    ],
    "type": "FeatureCollection"
}

Whats fascinating about this is it only happens for house number 52, not any house around it.

[lonvia]

This is somewhat intentional (you are more likely to search for something in the language that you speak) but currently not well tuned.

Duplicate of #746.