Is one country's sign language different from another?
Is sign language universal among deaf people, or are there different varieties for different countries?
How come there is no established Universal Sign Language? Why do several countries have their own version of it? If Deaf people use sign language to communicate, how do Deaf people without hands communicate? How many sign languages exist and what are the differences? Can tone-deaf people speak tonal languages (like Mandarin, Cantonese, etc.)? How do deaf people communicate? Can there be a universal language? Are there people born deaf and blind? If so how do they communicate? How similar are French and American Sign Languages? Is there any countries in which national language are not widely spoken and why? In what way do born Deaf people understand sound? Why are there so many different signed languages? How do people who are born deaf learn the language we usually talk? Indian Sign language detection for deaf and dumb using soft computing? Should there be a universal language? Is there any universal language? Can deaf people feel their own voices? Could and should the world have a universal language? Do deaf people have an internal monologue? What do Deaf people imagine sound to be? Do deaf people think in a voice? Or they visualize hands in their brains as a language? How are prelingual deaf people taught to read? Do Deaf people understand the concept of sound? In what way? What do deaf people imagine hearing sound is like? How do blind and deaf people learn to communicate? Does how a language sound represent the character of the nation? What share of the world population is bilingual? How do deaf-born people think? How likely is it that there will ever be a universal language used across Earth? Can deaf people laugh out loud? How do people who are deaf from birth interact with rhyme?