https://www.pcgamer.com/capcoms-stance-on-monster-hunter-world-mods-is-still-unclear/

Modders have been hard at work customizing and fine-tuning Monster Hunter: World's PC port, but while modding in excessive patriotism or essential armor transmogs is tempting, many players have been reluctant to use any mods out of fear of being banned. The cosmetic mods we're seeing for World aren't like the paid Street Fighter mods that have drawn Capcom's ire in the past, but World is still a multiplayer game with a vague EULA, so it's unclear what mods Capcom considers harmless. 

Concerned Reddit user Tenzi92 recently reached out to Capcom for clarification regarding two mods: one that replaces the Xbox button prompts with PS4 versions, and an armor transmog mod (presumably FineNerds' excellent mod). According to a screenshot posted by Tenzi92, a Capcom support representative said: