"Dutch" is a bastardization
of the word "Deutsch,"
The Big Bang Theory Season 12, Episode 7
I'm employing the work
of Dutch researcher, Mirjam Tuk,
The Big Bang Theory Season 7, Episode 19
...to the Dutch researchers
that Leonard is currently ripping off.
The Big Bang Theory Season 3, Episode 10
why they're called
Pennsylvania Dutch
The Big Bang Theory Season 12, Episode 7