Vocabulary consisting only from characters you are able to read
母国語
ぼこくご
mother tongue, native languagemix
集中力
しゅうちゅうりょく
(powers of) concentration, ability to concentratemix
行われる
おこなわれる
to be done, to be practiced, to be practised, to take place, to be held, to be prevalent, to be in fashion, to be in vogue, to be current, to come into useichidan, verb