Are all language trees equal in length?
Is so, what is the shortest, and the longest?
Well, Norwegian has 117 skills.
German and Dutch are 1 skill away from each other, with German in the lead (I'm pretty sure german has 124, I can't remember the exact number, but I know dutch is 1 less, and they both have more than Norwegian)
BUT, German has 3 bonus skills... so If you don't count those, Dutch has more skills.
EDIT: now that I think about it, I'm not sure whether or not I was counting the bonus skills, so I'll get back to y'all on that
Courses also vary in length depending on the starting language.
For instance, Russian -> German course has only about 70 skills.
Also, courses differ within the same pair. E.g., Russian -> English is 55 skills long while English -> Russian is 79, so they are not like simply reversed versions of each other.
Just some examples (bonus skills in parenthesis): German from English 121(3) skills, German from French 117 skills, French from English 78(3) skills, French from German 68 skills, Dutch from English 123 skills, Norwegian from English 117 skills, Italian from English 66 skills.