| Lojban is a team effort of the Logical Language Group, Inc., and is one of the most thoroughly worked out of conlangs. |
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| There are over 1,300 root gismu in the Lojban vocabulary, and these structures form a very interesting ontology of their own. |
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| An a priori vocabulary such as that of Spokil or Kotava, or a vocabulary constructed mathematically, such as that of Loglan or Lojban, would likely be as comprehensible. |
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| The constructed language Lojban has multiple sorts of copula. |
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