Plugins - acts_as_good_speeler
Add to favoritesFor a while now, there have been a number of errors pointed out in the Rails inflector. Usually, the suggestion is to fix it in environment.rb or make a plugin. Well, this is that plugin.
Eat that.
You don't have to do anything special to use this plugin. Just install it, and the plugin overrides the built-in Inflector class.
http://www.jeremymcanally.com/
http://code.jeremymcanally.com/acts_as_good_speeler
Rails' (MIT)
Misc. Enhancements

Good to see you've covered "pokémon" :)
Haven't used the plugin yet, but from peeking at the code, it appears the plural of 'test' is 'testes'. Hah!