Since Invisalign aligners do not in any way cover the roof of your mouth or your tongue, it will not affect speaking to any noticeable degree. learn more about in this video
At first, wearing the new trays there may be a small amount of discomfort that could cause you to possibly slur or stumble on a few words, but that will not last long at all or have any real effect on your speech. In short, no, Invisalign aligners will not affect your speech.