While auditing my bot's changes, I noticed some new edit summaries don't mention all languages.
Examples:
- https://www.wikidata.org/w/index.php?title=Q19900828&diff=prev&oldid=1128605340 (en, es)
- https://www.wikidata.org/w/index.php?title=Q1&diff=prev&oldid=1128626229 (tr)
- https://www.wikidata.org/w/index.php?title=Q473858&diff=prev&oldid=1128621407 (en)
- https://www.wikidata.org/w/index.php?title=Q79692&diff=prev&oldid=1128641493 (de)
In these edits, my bot removed a duplicate alias in the language but it isn't mentioned.
The common thing could be that there is always at least one other alias left in the same language.