This thread is resolved. Here is a description of the problem and solution.
Problem: I can't Translate word (Menu) in the Menu in all languages even I translated with String translation.
Solution: This word is a part of the theme settings (since you were able to change it through Appearance → Customize) and you just needed to make WPML know about this word.
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.
Our next available supporter will start replying to tickets in about 11.89 hours from now. Thank you for your understanding.
Please make sure to update to WPML to the latest and check our list of Known Issues before reporting