While there is not currently an option to show a translated version of user generated content based off an individual's language settings, if this is a feature you are interested in I would suggest one of the following:
1. Create an idea in the Ideas for Jive space where our Product Managers review through top rated ideas when considering features for future releases.
2. If you are wanting this type of feature added to your current instance our Professional Services team can assist in determine the scope of the project and working with you to develop a custom solution which would meet your use case. If you are interested in this option, please submit a case in your customer group here in the Jive Community and the next available support engineer can get an engagement set up for you.