Thanks @invocation, I didn't know t2bot. Too bad it doesn't support slack though.
If you are not using matrix.org you can try this;
https://dimension.t2bot.io/
After logging into matrix.org with element, there will be an option like this in the room information section;
@invocation
Oh no! Translated strings are missing! 😅 so it's a bridge to matrix in order to get a bridge to slack? That's a lot of bridges for only one salck room! 😆
@polygoat@polyglot.city matrix.org supports the slack bridge. alternatively, t2bot supports matrix bridge