Learn how the Locale API flows from your appapplication, get translated and are sent back again. As professional human translations is not instant, your API projects needs to have a callback URL. Once the translations are done, this URL is called with the translated JSON payload. If your app doesn't application does not send a success response code back (eg. 200..299), the Locale API will retry using exponential backoffback off.
How long it takes to get your translations depends on various factors, including the amount of words, source language and target languages.