greetings.yml

hello:
  en: "Hello world"
  es: "Hola mundo"
  fr: "Bonjour tout le monde"
  zh: "你好世界"
  esperanto: "Saluton mondo"
  de: "Hallo welt"
  it: "Ciao mondo"
  latin: "Salve mundi"
  pt: "Olá mundo"
  ru: "привет мир"
  tamil: "ஹலோ உலகம்"
  welsch: "Helo byd"

hello.rb

require 'yaml'

greetings = YAML.load_file('greetings.yml')
greetings['hello'].each_value {|value| puts value}

output

$ ruby hello.rb
Hello world
Hola mundo
Bonjour tout le monde
你好世界
Saluton mondo
Hallo welt
Ciao mondo
Salve mundi
Olá mundo
привет мир
ஹலோ உலகம்
Helo byd
$