The original string is "Software & Updates", so if you are right, a lot of users (not only French) ought to run into the issue and there would be a need to either change the original string or make whatever uses the string when upgrading Ubuntu via update-manager capable of dealing with an unescaped '&' character.
What makes you think that the single '&' character is the culprit? What does the error alert say? -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to software-properties in Ubuntu. https://bugs.launchpad.net/bugs/1639743 Title: `&` in french translaction "Logiciels & mises à jour" should be escaped as `&` Status in software-properties package in Ubuntu: Incomplete Status in update-manager package in Ubuntu: Invalid Bug description: When running update-manager in French the "Logiciels & mises à jour" sentence make the update-manager to fail with an empty dialog. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/1639743/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp