Acceptance Criteria

• English content can be edited in wmde/fundraising-frontend-content.
• Missing content in one of the languages is detected during CI checks.

Notes

• The keys of the translation files that are based on the key/value format can be diffed against each other.
• Before doing the diff, keys that have an empty value should be dropped.
• We can use Travis for the CI check (as part of the json linting tasks).
• We can use PHP for this.