Suggestion #1
When you click the cross icon to clear the contents of the box, the translated text should also be cleared, just like in other translation services such as Google Translate, Bing Translator, or Deepl Translate.
Suggestion #2
When clicking on the cross icon to clear the content of the box, the field should be focused again so that we do not have to click in the field again to enter new text.
Suggestion #3
Do not translate in real time, so maybe API costs could be reduced, but I have no details on this, so maybe this suggestion is moot.