This thread is resolved. Here is a description of the problem and solution.
Problem: Can't translate a footer widget using string translations
Solution: Please try this other way of translating widgets in the link below: https://wpml.org/documentation/getting-started-guide/translating-widgets/displaying-different-widgets-for-different-languages/
That works a bit differently and it might help you accomplish what you need.
This is the technical support forum for WPML - the multilingual WordPress plugin.
Everyone can read, but only WPML clients can post here. WPML team is replying on the forum 6 days per week, 22 hours per day.