private void ChangeLanguage(Control container, ComponentResourceManager resourceManager, CultureInfo culture)
{
	foreach (Control c in container.Controls)
	{
		if (c is Label || c is GroupBox || c is DevExpress.XtraTab.XtraTabPage || c is TextBox || c is System.Windows.Forms.ToolStripMenuItem)
		{
			resourceManager.ApplyResources(c, c.Name, culture);
		}

		if (c.Controls.Count > 0) ChangeLanguage(c, resourceManager, culture);
	}
}

private void cbJazyky_SelectedIndexChanged(object sender, EventArgs e)
{
	var resourceManager = new ComponentResourceManager(typeof(HlavniOknoMobile));
	CultureInfo culture;
	switch(cbJazyky.SelectedItem.ToString())
	{
		case "English":
			culture = new CultureInfo("en");
			break;
		case "Czech":
			culture = new CultureInfo("cs-CZ");
			break;
		default:
			throw new NotSupportedException();
	}

	ChangeLanguage(this, resourceManager, culture);
}

public HlavniOknoMobile()
        {
            Thread.CurrentThread.CurrentUICulture = new System.Globalization.CultureInfo("cs-CZ");
            InitializeComponent();
        }