"octopi" is incorrect

The -us ↔ -i forms come from Latin.

The word octopus is of Greek origin. It’s Greek plural form is octopodes, but in English the word is commonly pluralized according to English rules: octopuses.

Since so many people fall for this error, some dictionaries mark octopi as a possible pluralization. Nevertheless, we should not support this common mistake.

Both the logic and the readme need to be fixed.

Prooflinks:

• https://grammarist.com/usage/octopi-octopuses/
• https://en.wikipedia.org/wiki/Octopus

[wifelette]

@lolmaus Thanks for taking the time to care about the little details like this! From one fellow grammar nerd to another, much appreciated ❤️

[stefanpenner]

@lolmaus I just check, it does support octopus -> octopi:

gem install activesupport
irb
irb(main):008:0> require 'active_support/all'
=> true
irb(main):009:0> 'octopus'.pluralize
=> "octopi"

We will totally accept a PR to correct this.