i18n: Chaines de langues nouveau format

lang/medias.xml

lang/medias_ar.php

lang/medias_ast.php

lang/medias_ay.php

lang/medias_bg.php

lang/medias_br.php

lang/medias_bs.php

lang/medias_ca.php

lang/medias_co.php

lang/medias_cpf.php

lang/medias_cpf_hat.php

lang/medias_cs.php

lang/medias_da.php

lang/medias_de.php

lang/medias_el.php

lang/medias_en.php

lang/medias_en_hx.php

lang/medias_eo.php

lang/medias_es.php

lang/medias_eu.php