class I18n::Config

def interpolation_patterns=(interpolation_patterns)

I18n.config.interpolation_patterns << /\{\{(\w+)\}\}/

E.g. using {{}} as a placeholder like "{{hello}}, world!":

patterns.
Sets the current interpolation patterns. Used to set a interpolation 
def interpolation_patterns=(interpolation_patterns)
  @@interpolation_patterns = interpolation_patterns
end