English: Language codes for lang attribute are case sensitive. The full list can be found on <a href="https://gtranslate.io/supported-languages" target="_blank" rel="noreferrer">https://gtranslate.io/supported-languages</a>
Dutch: Taal codes voor het attribuut lang zijn hoofdlettergevoelig. De volledige lijst is te vinden op <a href="https://gtranslate.io/supported-languages" target="_blank" rel="noreferrer">https://gtranslate.io/supported-languages</a>