If you respect user's privacy, you should respect their native languages also. Many people don't know English. And users love to have apps in their language.
Please consider adding translated beta languages (like Serbian, Croatian, Chinese, Sweden, Czech, Finnish, Hungarian, Slovak, and all other beta languages which translated completely, or 90+%.
Add them as official or as some beta section (like as for translators/admins). That's very important if you want new users and keep them.
Many people can't find the beta language. How to find the links and apply them? They're not wizards.
When people move from WhatsApp to Telegram, the first question is - Where's my language?
We can't distribute translation through the official groups. What's the point of translation if users can't use it?
Just keep in mind that all other similar apps have localization (WhatsApp, Signal, Viber, etc.).