The ecx:productCatalog function handles the resolution of localized values. Below are the accepted function formats.

ValueFormats
productName

<%${ecx:productCatalog('aaa-bbb-ccc','localizedProductNames')['de']}%>
<%${ecx:productCatalog('aaa-bbb-ccc','productName_de')}%>
productPrice

<%${ecx:productCatalog('aaa-bbb-ccc','localizedProductPrices')['de']}%>

<%${ecx:productCatalog('aaa-bbb-ccc','productPrice_eur')}%>

msrp

<%${ecx:productCatalog('aaa-bbb-ccc','localizedMsrp')['eur']}%>

<%${ecx:productCatalog('aaa-bbb-ccc','msrp_eur')}%>

description

<%${ecx:productCatalog('aaa-bbb-ccc','localizedDescriptions')['de']}%>

<%${ecx:productCatalog('aaa-bbb-ccc','description_de')}%>

productURL

<%${ecx:productCatalog('aaa-bbb-ccc','localizedProductURLs')['de']}%>

<%${ecx:productCatalog('aaa-bbb-ccc','productURL_de')}%>

variant

<%${ecx:productCatalog('aaa-bbb-ccc','variant')['xl']}%>

<%${ecx:productCatalog('aaa-bbb-ccc','variant_xl')}%>