the search filter seems to have some hard coded logic, preferring languages like R (4 projects [1]) over Scala (5 projects [2]). I wonder if that's based on trends or purely taste (or just cache :-)).

  [1] https://opensource.google.com/projects/search?q=%20&language=r
  [2] https://opensource.google.com/projects/search?q=%20&language=scala