This example uses OpenLayers v10.9.0. The latest is v.
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#### Localized OpenStreetMap

localized-openstreetmap 1 openseamap 1 openstreetmap 22

#####

Example of a localized OpenStreetMap map with a custom tile server and a custom attribution.

The base layer is OpenCycleMap with an overlay from OpenSeaMap.

##### main.js

    import Map from 'ol/Map.js';
    import View from 'ol/View.js';
    import TileLayer from 'ol/layer/Tile.js';
    import OSM, {ATTRIBUTION} from 'ol/source/OSM.js';

    const openCycleMapLayer = new TileLayer({
      source: new OSM({
        attributions: [
          'All maps © <a href="https://www.opencyclemap.org/">OpenCycleMap</a>',
          ATTRIBUTION,
        ],
        url:
          'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
          '?apikey=Your API key from https://www.thunderforest.com/docs/apikeys/ here',
      }),
    });

    const openSeaMapLayer = new TileLayer({
      source: new OSM({
        attributions: [
          'All maps © <a href="https://www.openseamap.org/">OpenSeaMap</a>',
          ATTRIBUTION,
        ],
        url: 'https://tiles.openseamap.org/seamark/{z}/{x}/{y}.png',
      }),
    });

    const map = new Map({
      layers: [openCycleMapLayer, openSeaMapLayer],
      target: 'map',
      view: new View({
        maxZoom: 18,
        center: [-244780.24508882355, 5986452.183179816],
        zoom: 15,
      }),
    });

##### index.html

    <!DOCTYPE html>
    <html lang="en">
      <head>
        <meta charset="UTF-8">
        <title>Localized OpenStreetMap</title>
        <link rel="stylesheet" href="node_modules/ol/ol.css">
        <style>
          .map {
            width: 100%;
            height: 400px;
          }
        </style>
      </head>
      <body>
        <div id="map" class="map"></div>

        <script type="module" src="main.js"></script>
      </body>
    </html>

##### package.json

    {
      "name": "localized-openstreetmap",
      "dependencies": {
        "ol": "10.9.0"
      },
      "devDependencies": {
        "vite": "^3.2.3"
      },
      "scripts": {
        "start": "vite",
        "build": "vite build"
      }
    }