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 Bora language in terms of how difficult it would be for an English speaker to learn it.
Bora, a Wintotoan language spoken in Peru and Colombia near the border between the two countries, has a mind-boggling 350 different noun classes. The noun classifier system is actually highly productive and is often used to create new nouns. New nouns can be created very easily, and their meanings are often semantically transparent. In some noun classifier systems, classifiers can be stacked one upon the other. In these cases, typically the last one is used for agreement purposes. The classifier system effectively replaces much derivational morphology on the noun and noun compounding processes that other languages use to expand the meanings of nominals.
Bora also is a tonal language, but it has only two tones. In addition, nearly all consonantal phonemes have phonemic aspirated and palatalized counterparts. The agreement structure in the language is also quite convoluted.
Bora gets a 6 rating, hardest of all.