Ticker HTML/CSS Text language

I am struggling to get a Ticker to format the text correctly and I believe this is due to the language of the text.
Using “hyphens:auto; text-align:justify; text-justify: inter-word;” in the css, but according to another developer the language (german) needs to be specified in the html section so that word breaks occur between syllables and not just between random letters:

“<html lang=“de”> CONTENT </html”

However, the html section remove this tag on save. How can this be solved

If the rss feed is accessible online, could you send me a link to it here or via private message, I will take a look at it for you.

It is a Xibo Dataset, ordinary text. Would the CSV help?

I’ve sent you a private message.