I followed the Umbraco documentation to create a member registration and login (members-registration-and-login). I added some custom fields to the registration. As I was checking the validation of the fields, I recognized, that the validation errors are all in English, but I need them to be in German. I'm looking for a proper way to overwrite the errors or to simply change the language.

I tried to use "data-val-required" but this only works for the fields that are pre-set but not for my custom fields.

Since I have custom fields, the Register Model doesn't contain them, and I can't set the error text in the Model.

I'm using Umbraco V 13

    @if (registerModel.MemberProperties != null)
    {
        for (var i = 0; i < registerModel.MemberProperties.Count; i++)
        {
            <div class="mb-3">
                @Html.LabelFor(m => registerModel.MemberProperties[i].Value, registerModel.MemberProperties[i].Name + "*")  @* Here *@
                <input asp-for="@registerModel.MemberProperties[i].Value" class="form-control" aria-required="true" required />  @* Here *@
                @Html.HiddenFor(m => registerModel.MemberProperties[i].Alias)
                <span asp-validation-for="@registerModel.MemberProperties[i].Value" class="form-text text-danger"></span>
            </div>
        }
    }