So, i have this search working:

if(ExamineManager.Instance.TryGetIndex("ExternalIndex", out var index))
    {
        var searcher = index.GetSearcher();
        var textFields = new[] { "nodeName", "metaDescription_da-dk",  "bodyText", "bodyText_da-dk"};
        var results = searcher.CreateQuery("content").GroupedOr(textFields, searchTerm).Execute();

        if (results.Any())
        {
            <ul>
                @foreach (var result in results)
                {
                    if (result.Id != null)
                    {
                        var node = Umbraco.Content(result.Id);
                        <li>
                            <a href="@node.Url">@node.Name</a><br/>
                            @node.Value("metaDescription")
                        </li>
                    }
                }
            </ul>
        }
        else
        {
            <p>No results found for query @searchTerm</p>
        }
    }
    return;
}
    }

But as it is now, i have to feed it all the document properties i want to search. Which could be ok, but its a multilingual site, so eg "bodyText" isn't searched, as it is bodyText_da-dk in Examine. So more work to keep in check. And even worse if the editor is allowed to create a new language... then this is not searched... So it would be nice to know a way to just search all fields..

Thanks