i use the wp google font plugin like in your tutorial.
all fonts are changed, but on two pints i see not the google font this is here: http://www.lightquest.de/ (startpage) the text under the portfolio images (portfolio from jetepack plugin)
and here: http://www.lightquest.de/blog/ http://www.lightquest.de/2016/08/01/blog-titel/
the titel of the blog post.
do you know the right css? so i can put the css in the css box from the google font plugin.
thank you