Bahá'u'lláh has proclaimed the adoption of a universal language. A language shall be agreed upon by which unity will be established in the world. Each person will require training in two languages, his native tongue and the universal auxiliary form of speech. This will facilitate intercommunication and dispel the misunderstandings which the barriers of language have occasioned in the world.
"One of the great steps towards universal peace would be the establishment of a universal language. Bahá'u'lláh commands that the servants of humanity should meet together, and either choose a language which now exists, or form a new one. ...There are more than eight hundred languages in the world, and no person could acquire them all.
The races of mankind are not isolated as in former days. Now, in order to be in close relationship with all countries it is necessary to be able to speak their tongues.
A universal language would make intercourse possible with every nation. Thus it would be needful to know two languages only, the mother tongue and the universal speech. The latter would enable a man to communicate with any and every man in the world!
A third language would not be needed. To be able to talk with a member of any race and country without requiring an interpreter, how helpful and restful to all!
..An international Congress should be formed, consisting of delegates from every nation in the world, Eastern as well as Western. This Congress should form a language that could be acquired by all, and every country would thereby reap great benefit.
Until such a language is in use, the world will continue to feel the vast need of this means of intercourse. Difference of speech is one of the most fruitful causes of dislike and distrust that exists between nations, which are kept apart by their inability to understand each other's language more than by any other reason.
If everybody could speak one language, how much more easy would it be to serve humanity!"
('Abdu'l-Bahá: Paris Talks, Pages: 155-157)