Complex sentence: Bahá'u'lláh and 'Abdu'l-Bahá have mentioned virtue in Arabic, Esperanto, and English, but it is understood by Bahá'ís that it will be decided in the future, by an appointed committee whose members are invested with this authority by the world's governments.
Split into simpler sentences: Bahá'u'lláh and 'Abdu'l-Bahá have mentioned virtue in Arabic, Esperanto, and English. It is understood by Bahá'ís, however, that the language will be selected in the future, by an appointed committee whose members are invested with this authority by the world's governments.