say is a simple string key/value store for i18n or any other case where you want namespaced strings.
Check out busted for extended examples.
s = require("say")
s:set_namespace("en")
s:set('money', 'I have %s dollars')
s:set('wow', 'So much money!')
print(s('money', {1000})) -- I have 1000 dollars
s:set_namespace("fr") -- switch to french!
s:set('wow', "Tant d'argent!")
print(s('wow')) -- Tant d'argent!
s:set_namespace("en") -- switch back to english!
print(s('wow')) -- So much money!
NOTE: the parameters table can have nil values, but in that case it must have an n field to indicate table size.
s = require("say")
s:set('money', 'I have %s %s')
print(s('money', {1000, "dollars"})) -- I have 1000 dollars
print(s('money', {nil, "euros", n = 2})) -- I have nil euros