A content analysis of speeches given by European politicians suggests that cultural liberals tend to use more complex languages while cultural conservatives tend to use simpler languages. This study does not compare politicians based on the economic conservative-liberal axis (i.e. socialist versus capitalist).
* This study, however, has some serious problem with methodology -- see https://andreadallover.com/2019/02/26/stop-using-the-flesch-kincaid-test/
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko