WhatsApp is rolling out Message Translations, letting users translate texts in 1:1 chats, groups, and Channels.
Long-press a message → tap Translate → pick languages.
Android: option for automatic translation in entire chats; supports 6 languages (English, Spanish, Hindi, Portuguese, Russian, Arabic).
iPhone: supports 19+ languages.
Translations happen on-device, keeping messages private.
Source: GSMArena