Polish letters with diacritics are not handled properly

[Etua]

While using Transportr I noticed that public transport stops with diacritics in their names are not displayed properly nor can be searched by their correct form. Instead they are replaced with closest standard Latin counterpart e.g. ą -> a, ć -> c etc. However ó is not affected for some reason.

@mimi89999

[mimi89999]

Stop names and labels on Navitia contain only Latin characters, but data from @MKuranowski (https://mkuran.pl/feed/ztm/) doesn't have that issue. I will contact Navitia about the problem.

Stop point on Navitia:

{
    "embedded_type": "stop_point",
    "id": "stop_point:OWW:SP:sw2"
    "name": "Swietokrzyska - Peron M2 (Warszawa)",
    "quality": 0,
    "stop_point": ⊖{
        "administrative_regions": ⊕[2 items],
        "codes": ⊕[3 items],
        "coord": ⊕{2 items},
        "equipments": ⊕[1 item],
        "fare_zone": ⊕{1 item},
        "id": "stop_point:OWW:SP:sw2",
        "label": "Swietokrzyska - Peron M2 (Warszawa)",
        "links": [],
        "name": "Swietokrzyska - Peron M2",
        "stop_area": ⊕{7 items}
    },
}

[prhod]

Hello, this is indeed a limitation for some (most of ?) of navitia's coverages. When several datasets needs to be merge in one coverage, only iso-8859-1 characters are allowed (limitation of our actual merging tool). We are working on a new data process pipeline, but it will take some more months, sorry for the inconvenience. BTW, here is an example without merge on Israel data

[Etua]

I wasn't able to reproduce the issue with the newest release.