Add Catalan translation

[crbelaus]

Summary of changes

Catalan translation is missing

Checklist

• [ ] New functions have typespecs, changed functions were updated
• [ ] Same for documentation, including moduledocs
• [ ] Tests were added or updated to cover changes
• [x] Commits were squashed into a single coherent commit
• [x] Notes added to CHANGELOG file which describe changes at a high-level