Jira Cloud Plugin translating rendered content

[Stefan Neidig]

I want to provide my Jira Cloud Plugin in multiple languages. I read the article about internationalising it (see https://developer.atlassian.com/cloud/confluence/internationalization/). However, this article tells me only how to translate the names of my modules (i.e. general pages, web links, etc). When accessing one of these modules some HTML is rendered by me and then displayed in the iframe. This content should also be translated as well. How do I do this? Didn't find anything about this. Thanks for your help.