Why text in japanese/chinese?

[AC Question]

My Samsung 4 has begun translating my outgoing text randomly in symbols. As well as random text from friends. It began tues. 10/25/16. It appears to be symbols of another language I.e. Japanese or chinese. I must fix this!

 

[Laura Knotek]

Hi and welcome to AndroidCentral. Are your friends using iPhones?

What SMS app are you using?