Something about Jannah?

Walakumasalam,

Yes, only those who are muslim, true muslims will go to Jannah. The ones who believe in the ones of Allah, Muhammad SAW being the last prophet, the Judgement day etc. If you read Surah Baqarah, it repeated tells that a muslim is someone who believes in certain things and that he follows the rules of Allah, and his reward is Jannah. In Jannah, only Islam will be the religion, and many have said that Arabic will be the language(this one i don't know about, but the religion part i do know).

I hope this helps and what i've told you is to the best of my knowledge. May Allah forgive me if i've made a mistake. Amen

Everyone who hears the message of Islam in a sound and correct form (and rejects it), will have evidence aginst him. Whoever dies without having heard the message, or having heard it in a distorted form, then his case is in the hands of Allaah. Allaah knows best about His creation, and He will never treat anyone unfairly. And Allaah is All-Seer of His slaves.