Translation

Telegram allows translating chat messages: Telegram Premium users may even enable real-time chat translation.

textWithEntities#751f3146 text:string entities:Vector<MessageEntity> = TextWithEntities;

messages.translateResult#33db32f8 result:Vector<TextWithEntities> = messages.TranslatedText;


---functions---

messages.translateText#63183030 flags:# peer:flags.0?InputPeer id:flags.0?Vector<int> text:flags.1?Vector<TextWithEntities> to_lang:string = messages.TranslatedText;

messages.translateText can be used to translate a list of chat messages (by populating the peer and id flags), or a generic list of messages (by populating the text flag, for example when translating instant view articles).

The method will return a vector of textWithEntities constructors, containing the translated text, and, only for Telegram Premium users, the corresponding styled text entities (i.e. correctly repositioned bold, italic, link entities for the translated message, corresponding to the same entities in the original message).

Real-time translation

userFull#c577b5ad flags:# blocked:flags.0?true phone_calls_available:flags.4?true phone_calls_private:flags.5?true can_pin_message:flags.7?true has_scheduled:flags.12?true video_calls_available:flags.13?true voice_messages_forbidden:flags.20?true translations_disabled:flags.23?true stories_pinned_available:flags.26?true blocked_my_stories_from:flags.27?true wallpaper_overridden:flags.28?true contact_require_premium:flags.29?true read_dates_private:flags.30?true flags2:# sponsored_enabled:flags2.7?true can_view_revenue:flags2.9?true bot_can_manage_emoji_status:flags2.10?true display_gifts_button:flags2.16?true id:long about:flags.1?string settings:PeerSettings personal_photo:flags.21?Photo profile_photo:flags.2?Photo fallback_photo:flags.22?Photo notify_settings:PeerNotifySettings bot_info:flags.3?BotInfo pinned_msg_id:flags.6?int common_chats_count:int folder_id:flags.11?int ttl_period:flags.14?int theme:flags.15?ChatTheme private_forward_name:flags.16?string bot_group_admin_rights:flags.17?ChatAdminRights bot_broadcast_admin_rights:flags.18?ChatAdminRights wallpaper:flags.24?WallPaper stories:flags.25?PeerStories business_work_hours:flags2.0?BusinessWorkHours business_location:flags2.1?BusinessLocation business_greeting_message:flags2.2?BusinessGreetingMessage business_away_message:flags2.3?BusinessAwayMessage business_intro:flags2.4?BusinessIntro birthday:flags2.5?Birthday personal_channel_id:flags2.6?long personal_channel_message:flags2.6?int stargifts_count:flags2.8?int starref_program:flags2.11?StarRefProgram bot_verification:flags2.12?BotVerification send_paid_messages_stars:flags2.14?long disallowed_gifts:flags2.15?DisallowedGiftsSettings stars_rating:flags2.17?StarsRating stars_my_pending_rating:flags2.18?StarsRating stars_my_pending_rating_date:flags2.18?int main_tab:flags2.20?ProfileTab saved_music:flags2.21?Document = UserFull;

chatFull#2633421b flags:# can_set_username:flags.7?true has_scheduled:flags.8?true translations_disabled:flags.19?true id:long about:string participants:ChatParticipants chat_photo:flags.2?Photo notify_settings:PeerNotifySettings exported_invite:flags.13?ExportedChatInvite bot_info:flags.3?Vector<BotInfo> pinned_msg_id:flags.6?int folder_id:flags.11?int call:flags.12?InputGroupCall ttl_period:flags.14?int groupcall_default_join_as:flags.15?Peer theme_emoticon:flags.16?string requests_pending:flags.17?int recent_requesters:flags.17?Vector<long> available_reactions:flags.18?ChatReactions reactions_limit:flags.20?int = ChatFull;

channelFull#e4e0b29d flags:# can_view_participants:flags.3?true can_set_username:flags.6?true can_set_stickers:flags.7?true hidden_prehistory:flags.10?true can_set_location:flags.16?true has_scheduled:flags.19?true can_view_stats:flags.20?true blocked:flags.22?true flags2:# can_delete_channel:flags2.0?true antispam:flags2.1?true participants_hidden:flags2.2?true translations_disabled:flags2.3?true stories_pinned_available:flags2.5?true view_forum_as_messages:flags2.6?true restricted_sponsored:flags2.11?true can_view_revenue:flags2.12?true paid_media_allowed:flags2.14?true can_view_stars_revenue:flags2.15?true paid_reactions_available:flags2.16?true stargifts_available:flags2.19?true paid_messages_available:flags2.20?true id:long about:string participants_count:flags.0?int admins_count:flags.1?int kicked_count:flags.2?int banned_count:flags.2?int online_count:flags.13?int read_inbox_max_id:int read_outbox_max_id:int unread_count:int chat_photo:Photo notify_settings:PeerNotifySettings exported_invite:flags.23?ExportedChatInvite bot_info:Vector<BotInfo> migrated_from_chat_id:flags.4?long migrated_from_max_id:flags.4?int pinned_msg_id:flags.5?int stickerset:flags.8?StickerSet available_min_id:flags.9?int folder_id:flags.11?int linked_chat_id:flags.14?long location:flags.15?ChannelLocation slowmode_seconds:flags.17?int slowmode_next_send_date:flags.18?int stats_dc:flags.12?int pts:int call:flags.21?InputGroupCall ttl_period:flags.24?int pending_suggestions:flags.25?Vector<string> groupcall_default_join_as:flags.26?Peer theme_emoticon:flags.27?string requests_pending:flags.28?int recent_requesters:flags.28?Vector<long> default_send_as:flags.29?Peer available_reactions:flags.30?ChatReactions reactions_limit:flags2.13?int stories:flags2.4?PeerStories wallpaper:flags2.7?WallPaper boosts_applied:flags2.8?int boosts_unrestrict:flags2.9?int emojiset:flags2.10?StickerSet bot_verification:flags2.17?BotVerification stargifts_count:flags2.18?int send_paid_messages_stars:flags2.21?long main_tab:flags2.22?ProfileTab = ChatFull;

---functions---

messages.togglePeerTranslations#e47cb579 flags:# disabled:flags.0?true peer:InputPeer = Bool;

Telegram Premium users may also enable real-time chat translation.
If the currently logged in account is a Premium account, and the translations_disabled flag of userFull, chatFull, channelFull is not set, the client should run a local language recognition model for all messages received from private chats (not secret chats), chats and channels, and if:

• The language recognition model was ran on at least 8 messages in the chat,
• and the language of at least 35% of the processed messages was successfully detected,
• and at least 65% of the messages whose language was successfully detected are in a foreign language (a language that is not the system language nor the Telegram in-app language, and a language that was not explicitly excluded from translation by the user),
• then, a popup should be displayed to the user, offering to enable real-time chat translation, or to disallow translation of the detected language (the detected language is the language with most occurrences amongst all processed messages).

If the user dismisses the autotranslation popup, invoke messages.togglePeerTranslations with the disabled flag set: this will set the translations_disabled flag in the corresponding full info constructor, signaling to the other sessions that the autotranslation popup should not be displayed.

If the user enables autotranslation, store the preference locally and invoke messages.translateText for every received message, preferrably batching requests by specifying multiple message IDs in id.

Autotranslation for channels

channel#fe685355 flags:# creator:flags.0?true left:flags.2?true broadcast:flags.5?true verified:flags.7?true megagroup:flags.8?true restricted:flags.9?true signatures:flags.11?true min:flags.12?true scam:flags.19?true has_link:flags.20?true has_geo:flags.21?true slowmode_enabled:flags.22?true call_active:flags.23?true call_not_empty:flags.24?true fake:flags.25?true gigagroup:flags.26?true noforwards:flags.27?true join_to_send:flags.28?true join_request:flags.29?true forum:flags.30?true flags2:# stories_hidden:flags2.1?true stories_hidden_min:flags2.2?true stories_unavailable:flags2.3?true signature_profiles:flags2.12?true autotranslation:flags2.15?true broadcast_messages_allowed:flags2.16?true monoforum:flags2.17?true forum_tabs:flags2.19?true id:long access_hash:flags.13?long title:string username:flags.6?string photo:ChatPhoto date:int restriction_reason:flags.9?Vector<RestrictionReason> admin_rights:flags.14?ChatAdminRights banned_rights:flags.15?ChatBannedRights default_banned_rights:flags.18?ChatBannedRights participants_count:flags.17?int usernames:flags2.0?Vector<Username> stories_max_id:flags2.4?int color:flags2.7?PeerColor profile_color:flags2.8?PeerColor emoji_status:flags2.9?EmojiStatus level:flags2.10?int subscription_until_date:flags2.11?int bot_verification_icon:flags2.13?long send_paid_messages_stars:flags2.14?long linked_monoforum_id:flags2.18?long = Chat;

channelAdminLogEventActionToggleAutotranslation#c517f77e new_value:Bool = ChannelAdminLogEventAction;

---functions---

channels.toggleAutotranslation#167fc0a1 channel:InputChannel enabled:Bool = Updates;

After reaching the boost level » specified in the channel_autotranslation_level_min client configuration parameter », channels can enable autotranslation of all messages for all users (including those without a Premium subscription) by invoking channels.toggleAutotranslation: this will emit a channelAdminLogEventActionToggleAutotranslation to the admin log.

The channel.autotranslation flag will be set for channels with autotranslation enabled.