A universal manual language will be a good idea to allow all deaf people to communicate despite their nationality. However, the creation of a universal language and written language is not necessary as the English language is already used.
Often sign language is unique in each country, this limits the communication bewteen deaf people from different nations. Due to this, the creation of a worldwide manual language would be a great idea as this would benefit deaf people communicating around the world.
The creation of this type of language is rather innecessary as nowadays English language is the one used around the globe for communication.
Learn more about languages in: https://brainly.com/question/2514647
#SPJ1