I believe that you are referring to this[0] study. It has since been published (2011), though it&#x27;s not openly accessible.<p>Page 8 of a presentation by the author[1] shows that out of 7 languages (Japanese, Italian, Spanish, French, German, English, and Mandarin) English is the second most information dense language, Mandarin being the most. Spanish is characterised by a fast rate of low-density syllables.<p>A Spanish to English comparison (eye-balling) would be that Spanish is spoken at a rate of 7.8 syllables per second vs 6.2 for English (≈ 22.9% faster). (Spanish compared as a lot of comments are referencing its simplicity)<p>English, compared in the referenced study, achieves the highest information rate, is spoken at a moderate-slow speed with a high information density.<p>[0] <a href="http:&#x2F;&#x2F;www.ddl.ish-lyon.cnrs.fr&#x2F;fulltext&#x2F;pellegrino&#x2F;pellegrino_to%20appear_language.pdf" rel="nofollow">http:&#x2F;&#x2F;www.ddl.ish-lyon.cnrs.fr&#x2F;fulltext&#x2F;pellegrino&#x2F;pellegri...</a>
[1] <a href="http:&#x2F;&#x2F;neukom.dartmouth.edu&#x2F;docs&#x2F;pellegrino-presentation-dartmouth2012.pdf" rel="nofollow">http:&#x2F;&#x2F;neukom.dartmouth.edu&#x2F;docs&#x2F;pellegrino-presentation-dar...</a>