do all asian speak the same language?

Do you know how big Asia is? and how many countries are in Asia? and how many ethnics there are?

God.. its obvious isnt it that we all have a different language!

Absolutely not. Though some major languages are related, depending on what Asian continent and/or area you wish to point at, they are not similar altogether. For example, Chinese languages and Tibetan are of the Sino-Tibetan language family, with Burmese being a distantly related language. Same can go with the South-East Asian languages, being all, but again distantly, related. Korean and Japonic languages are an exception as little is known of how they came into being, albeit several theories by linguists who study in them.

So again, the answer is simple: no.

Considering as Asia is a freaking huge continent, the answer is obviously no.

There's Azeri, Kazakh, Kyrgyz, Tatar, Turkish, Turkmen, Uyghur, Uzbek, Buryat, Mongolian, Ainu, Japanese, Ryukyuan, Korean, Persian, Chinese (Cantonese, Gan, Hakka, Mandarin, Min, Wu and Xiang, respectively), Khasi, Khmer, Mon, Kuy, Nicobarese, Vietnamese, Santali, Atayal, Paiwan, Cebuano, Hiligaynon, Ilokano, Tagalog, Cham, Indonesian, Javanese, Malay, Sundanese, Tetum, Hkamti, Lao, Nyaw, Thai, Tamil, Bodo, Burmese, Dzongkha, Jingpho, Karen, Kayah, Meitei, Mizo, Rahkine, Tibetan, Dogri, Kashmiri, Nepali, Sindhi, Saraiki, Bengali, Gujarati, Punjabi, Khariboli, Haryanvi, Kanauji, Awadhi, Chhattisgarhi, Assamese, Bengali, Chittagonian, Sylheti, Angika, Bhojpuri, Maithili, Magahi, Sadri, Halbi, Oriya, Dhivehi, Konkani, Marathi, Sinhala, Kurukh, Malto, Gondi, Maria, Pardhan, Nagarcha, Telugu, Malayalam, Tamil, Kannada, Arabic, Aramaic, Hebrew, Persian, Kurdish, Lurish, and Baluchi, just to name a few.

And what language would that be...Asianese?. There are around 126 languages spoken ONLY in India. If you take the whole Asia the number may come close to 500 or something...

check the map of countries of Asia,and each link will tell you of the languages spoken there.

asia is big continent in which there are many different country are located that why every country own languages like indian speak hindi china speak chiness .,etc got it now

No. Filipino, Chinese, Japanese, and tons others.

You can't be serious.