Good news for all our US customers: The API license needed to use the DeepL machine translation plugin in Help+Manual and HelpXplain is now also available in the USA for just $5.49 per month.
The license is referred to as DeepL Pro. Here is the DeepL announcement:
DeepL posting on the new license
You can order the new DeepL Pro license on this page:
Order page for the new license
In addition to the monthly fee there is also a charge for translation volume. However, the amounts here are so generous that it would be difficult to exceed $10 per month in total.