The easiest thing you can do to slow down your pace and make it easier on the translator is to simply pause after each slide. Now I have suggested this to dozens of speakers and less than half of them actually do it once they get up on the stage and start speaking. Why? Because auto-pilot takes over and they are presenting from their subconscious mind, not actively optimizing their presentation as they deliver. It is hard to blame them because this is a very difficult mind exercise when you are standing in front of 100s or 1000s of people.