ClusterMoreUpdatesModal component did not get internationalized when the rest of the Administration section did as the result of any oversight on my part.
Checked on 4.7.0-0.nightly-2020-12-21-131655, the fix has been contained in the payload. Just check fix in code since no available 3.7 release version for test now.
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.7.0 security, bug fix, and enhancement update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:5633