Pontoon: Update English (en-GB) localization of Mozilla Learning Network
Pontoon: Update English (en-GB) localization of Mozilla Learning Network

Localization authors:
- Ian Neal <iann_bugzilla@blueyonder.co.uk>

mozilla/teach.mozilla.org,mozilla/learning.mozilla.org,mozilla/teach.webmaker.org,mozilla/teach.mozilla.org,mozilla/teach.webmaker.org