Method and Conclusion. See here.
Results. A ratings system was designed in terms of how difficult it would be for an English-language speaker to learn the language. In the case of English, English was judged according to how hard it would be for a non-English speaker to learn the language. Speaking, reading and writing were all considered.
Ratings: Languages are rated 1-6, easiest to hardest. 1 = easiest, 2 = moderately easy to average, 3 = average to moderately difficult, 4 = very difficult, 5 = extremely difficult, 6 = most difficult of all. Ratings are impressionistic.
Time needed. Time needed for an English language speaker to learn the language “reasonably well”: Level 1 languages = 3 months-1 year. Level 2 languages = 6 months-1 year. Level 3 languages = 1-2 years. Level 4 languages = 2 years. Level 5 languages = 3-4 years, but some may take longer. Level 6 languages = more than 4 years.
This post will look at the Tariana language in terms of how difficult it would be for an English speaker to learn it.
Tariana is a very difficult language mostly because of the unbelievable amount of information it crams into its morphology and syntax. This is mostly because it is an Arawakan language that has been heavily influenced by neighboring Tucanoan languages, with the result that it has many of the grammatical categories and particles present in both families.
This stems from the widespread bilingualism in the Vaupes Basin of Colombia, where many people grow up bilingual from childhood and often become multilingual by adulthood. Learning up to five different languages is common. Code-switching was frowned upon and anyone using a word from Language Y while speaking Language X would get laughed at. Hence the various languages tended to borrow features from each other quite easily.
For instance, Tariana has both a noun classifier system and a gender system. Noun classifiers and gender are sometimes subsumed under the single category of “noun classifiers.” Yet Tariana has both, presumably from its relationship to two completely different language families. So in Tariana is not unusual to get both demonstratives and verbs marked for both gender and noun classifier. Tariana borrowed such things as serialized perception verbs and the dubitative marker from Tucano.
In addition, Tariana has some very odd sounds, including aspirated nasals mh (mʰ), nh (n̺ʰ) and ñh (ɲʰ) and an aspirated w (wʰ) of all things. They seem to be actually aspirated, not just partially devoiced as many voiceless nasals and liquids are.
Tariana gets 6, hardest of all.