def initialize(wiki):
    """
    Initialize global datastructures.

    Parameters
    ----------
    wiki : list of dicts
        Each dict represents a langauge
    """
    globals()['iso2wiki'] = {}
    globals()['wiki2iso'] = {}
    globals()['wiki2label'] = {}
    for el in wiki:
        globals()['iso2wiki'][el['ISO 369-3']] = el['Wiki Code']
        globals()['wiki2iso'][el['Wiki Code']] = el['ISO 369-3']
        globals()['wiki2label'][el['Wiki Code']] = el['Label']
