LocalizationController.cs

public class LocalizationController : Controller
{
    private readonly ISitecoreLocalizer _sitecoreLocalizer;

    public LocalizationController(ISitecoreLocalizer sitecoreLocalizer)
    {
        _sitecoreLocalizer = sitecoreLocalizer;
    }

    [HttpPost]
    public IActionResult Reload()
    {
        _sitecoreLocalizer.Reload();
        return Ok();
    }
}