Background: T298009: Localisation update deleted many i18n files for Collection extension
Probable cause of things:
- Message group was split
- For these groups the messages were seen as new -> import page shows a warning and defaults to import and fuzzy
To avoid this from happening again, perhaps default to "import" instead of "import and fuzzy" if the message content is identical.
Could also make a specific instructions for splitting and renaming message groups
