class Rubocop::Cop::Style::AsciiIdentifiers

This cop checks for non-ascii characters in indentifier names.

def investigate(processed_source) 

def investigate(processed_source)
  processed_source.tokens.each do |t|
    if t.type == :tIDENTIFIER && !t.text.ascii_only?
      convention(nil, t.pos)
    end
  end
end