Override currency.phtml file in your theme
app/design/frontend/{vendore}/{theme}/Magento_Directory/templates/currency.phtml
Change line number 35
<?= $block->escapeHtml($_code) ?> - <?= $block->escapeHtml($_name) ?>
to
<?= __($block->escapeHtml($_code)) ?> - <?= __($block->escapeHtml($_name)) ?>
Create app/design/frontend/{vendore}/{theme}/i18n/en_US.csv file and write below code
"United Arab Emirates Dirham","UAE Dirham"
Change line number 28
<?= $block->escapeHtml($currentCurrencyCode) ?> - <?= @$block->escapeHtml($currencies[$currentCurrencyCode]) ?>
to
<?= __($block->escapeHtml($currentCurrencyCode)) ?> - <?= __(@$block->escapeHtml($currencies[$currentCurrencyCode])) ?>
I hope it's useful for you.