Comparison of Logical Language Features

Unambiguous phonology 1
Unambiguous syntax
Unambiguous morphology 2
Gender neutral 3
Standard 26 character alphabet 4
Easy to learn 5
Culturally neutral vocabulary
Culturally neutral verbs 6
Free of declension in number
Regular syntax 7
Noise tolerance8 9 10
  1. More phonologically distinct than most natural languages, but counter examples include ĝ /dʒ/, c /ts/, and ĉ /tʃ/ (logically, these would be digraphs).
  2. Examples include Kataro (Qatar), kataro (group of cats), kataro (runny nose) and many compound words, such as kolego.
  3. Most English words are no longer inherently masculine, and do not require an infix to differentiate.
  4. Esperanto can be made to use the 26-character alphabet by placing an "x" after the base form of a letter, instead of using the letter with diacritics.
  5. Lojban's a priori vocabulary and uncommon syntax can lead to more time investment to become fluent.
  6. Esperanto's verbs are created via inflection (i -> a -> o), which is a foreign concept to many language learners.
  7. While Esperanto is mostly regular, it still suffers irregular verbs (such as esti) and semi-irregular prepositions (they may or may not require declension).
  8. Noise tolerance may or may not be considered essential to logical communication, but it is a core aspect of unambiguous communication.
  9. There is some debate about Lojban's noise tolerance. tolerance
  10. Esperanto's pronouns stand out as infamously phonetically ambiguous, and are often interchangeable in context. Li, sxi, ni, mi, vi, kio, kia, kiu are just a few examples.