I cannot write a single sentence when trying to add a description for a Mod without getting it blocked for upload, because what I assume is a language filter. It was extremely hard to get the description of this Mod in a state where the filter let it pass because the filter doesn’t tell me which word is the Problem. I had to do a binary search on the whole description and even then multiple words were problematic.
Go to my mod https://www.ageofempires.com/mods/details/4066 and copy the description to your mod update process and add the word “I” somewhere and it will be blocked. At least it was like that for me. This applies to a lot of vocabulary and even a lot of single letters.