Removed Limburgish and added Icelandic and Faroese! My source may be found here although some of the 'languages' listed there are more akin to dialects and thus not counted.
I may change it in future, but it is always difficult to draw the line between language and dialect. I don't include other dialects such as Flemish, Swiss German or Scots though.
Thank you, I've more language quizzes on the way! Frisian now has more type-ins, including 'Friesian' and also 'West Frisian', the name of the largest dialect.