Datatables Translation not working

Question

I'm struggling with Datatables translations. As far as I understand the documentation, it should load the language file via Ajax.

I don't see an HTTP request to the file /static/assets/js/datatables_de.json at all (not in Chrome's developer toolbar nor on the server). What am I doing wrong?

$(document).ready(function() {
    var hitstable = $('#hitstable').DataTable({
        "ajax": '/customer/ajax_get_hits',
        "stateSave": true,
        "aoColumnDefs": [
            { aTargets: [0], bSortable: false },
            { aTargets: [1], bSortable: true },
            { aTargets: [2], bSortable: true },
            { aTargets: [3], bSortable: true },
            { aTargets: [4], bSortable: true },
            { aTargets: [5], bSortable: true },
            { aTargets: [6], bSortable: true },
            { aTargets: [7], bSortable: true },
            { aTargets: [8], bSortable: false },
        ],
        "bServerSide": true,
        "order": [[ 1, "asc" ]],
        "oLanguage": {
            sProcessing: '<img src="/static/assets/img/loading.gif">'
        },
        "language": {
            "url": "/static/assets/js/datatables_de.json"
        }
    });
});

Answer 1

I Think I've figured it out.

It seems that oLanguage and language is not compatible. oLanguage is considered legacy, and just by adding it to the configuration it seems like it overrides the language field.

sProcessing is included in the language files, so you should not need to add it to the configuration.

Try and remove the oLanguage: https://jsfiddle.net/fzg38jta/1/

or by adding the language in the oLanguage instead:

{
    "sProcessing":   "Próiseáil...",
    "sLengthMenu":   "Taispeáin iontrálacha _MENU_",
    "sZeroRecords":  "Gan aon taifead meaitseáil aimsithe",
    "sInfo":         "_START_ Showing a _END_ na n-iontrálacha  _TOTAL_",
    "sInfoEmpty":    "Showing 0-0 na n-iontrálacha  0",
    "sInfoFiltered": "(scagtha ó _MAX_ iontrálacha iomlán)",
    "sInfoPostFix":  "",
    "sSearch":       "Cuardaigh:",
    "sUrl":          "",
    "oPaginate": {
        "sFirst":    "An Chéad",
        "sPrevious": "Roimhe Seo",
        "sNext":     "Ar Aghaidh",
        "sLast":     "Last"
    }
}