David Kimura PRO said about 3 years ago on Action Text Mentions and Notifications :
Great question. In situations where Action Text is used in a CMS or Blog, it can be a bit difficult as you probably wouldn't run the text through a translator. You could have multiple Action Text attributes on a model for each language or build a mechanism around Action Text which takes it into consideration, but I don't think that it natively supports i18n. https://github.com/rails/actiontext/issues/32 is about the only thing I could find in regards to it.