User Test Index 0:
{
  "Lang A"   => { match => 1, strings => ["jumped"] },
  "Lang Q"   => { match => 0, strings => ["red fox"] },
  "ref_lang" => { match => 1, strings => ["hollow log", "fence"] },
}
Results:
{ "Lang A" => [1, 3], "Lang Q" => [1, 2, 3], "ref_lang" => [1, 3] }
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User Test Index 1:
{
  "Lang A"   => { match => 1, strings => ["tree", "doe"] },
  "Lang Q"   => { match => 0, strings => ["gray fox"] },
  "ref_lang" => { match => 1, strings => ["tree", "fence"] },
}
Results:
{ "Lang A" => [2, 3], "Lang Q" => [2, 3], "ref_lang" => [2, 3] }
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