In Niara theme, on product-list-item.tp I have:
<span class="price product-price" itemprop="price" content="{if !$priceDisplay}{convertPrice price=$product.price}{else}{convertPrice price=$product.price_tax_exc}{/if}"><>{if !$priceDisplay}{convertPrice price=$product.price}{else}{convertPrice price=$product.price_tax_exc}{/if}
<meta itemprop="priceCurrency" content="{$currency->iso_code}">
</span>
But this line will show:
<span class="price product-price" itemprop="price" content="12,90 €">
12,90 € <meta itemprop="priceCurrency" content="EUR"></span>
And correct will be (I believe):
<span class="price product-price" itemprop="price" content="12.90">
12,90 € <meta itemprop="priceCurrency" content="EUR"></span>
Any idea how can I achieve this?