Hikashop - Product Page Image Carousel

Hello,

There is a related setting in Configuration > Display: "Thumbnails slider for product page" (No / Mobile only / Always). It changes how the image navigation is laid out, but it will not change the buttons you are seeing.

The real cause is on the template/CSS side, not a HikaShop option. On your product page the previous/next buttons show the words "Anterior" and "Siguiente" in orange over the image. HikaShop's arrows are just FontAwesome chevrons, and each one also contains a screen-reader-only label wrapped in the standard Joomla class element-invisible, which is supposed to hide that text visually. Your template does not define element-invisible anywhere, so the label becomes visible. I checked your page and there is no element-invisible rule in any of your stylesheets.

Add this to your template's custom CSS:

.element-invisible {
    position: absolute !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(1px, 1px, 1px, 1px);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
    padding: 0;
    margin: -1px;
}