WhatsApp had started working on switching languages about a month ago when in code of the latest beta for Android they had found each other indications of the new function.
As can be seen in the image below, the new entry within the menu Settings allows you to change language directly in the application.
The new feature, which was previously only available in some countrieslike India, through the voice Chat under the general Settings menu, it has already appeared for some users in beta number 18.104.22.168. Now though Whatsapp with the latest beta number 22.214.171.124 it has further expanded the number of people who can use it. Have you seen it? Let us know!