PiliBabel

Project Overview

PiliBabel turns bilibili's Chinese interface, titles, comments and danmaku into the language you choose, using either a built-in model or your own OpenAI-compatible endpoint. It continues the PiliNara / PiliPlus line, keeps video, live, dynamics and offline caching, and adds a global translation layer on top. Builds cover Android, Windows and Linux, with Android 7.0 as the floor; the language list merges the official model's 151 languages with 6 more (Traditional Chinese, Simplified and Traditional Wu, mainland and Taiwan Hokkien, Zhuang) for 157 in total.

Item	Value
Version	3.8.6
Platform	Android 7.0+, Windows, Linux
Stack	Flutter 3.47.2, Dart 3.13+
Engines	Built-in Index-Translate-35B-A3B or a self-hosted OpenAI-compatible endpoint
License	GPL-3.0

Install it and the bundled free model translates the whole interface, no API key required.

Key Features

• Global UI translation: about 1,650 strings are wrapped with uiTx(), covering navigation, video cards, detail pages, comments and dynamics
• Two engines: the built-in engine calls the free index-translate.bilibili.com/v1 endpoint, while the own-API mode accepts any /chat/completions address
• Danmaku translation: a separate toggle in the player's top-right corner, off by default, pre-translating 15-second batches ahead of the playhead
• Subtitle translation: Chinese external subtitles are translated in context-aware chunks, with multi-track management and an offline Vietnamese dictionary
• Glossary: 15 tables cover Genshin Impact, Honkai: Star Rail, Arknights and others, five languages each, more than 11,600 terms in total
• Headphone sync: the player defaults to mpv's AudioTrack backend in the order audiotrack,aaudio,opensles, aligning audio and video from measured latency
• Offline audio cache: Hi-Res, Dolby Atmos, 192K, 132K and 64K tiers, saved in the original CDN container as m4a, mp3, flac, wav, aac or ogg
• Download to folder: video is fetched as a single fnval=1 stream into a playable MP4, audio keeps its original format, and existing files are never overwritten
• Overseas CDN preference: *.akamaized.net, mirror*ov and cn-hk-eq-bcache edges are preferred when present

How to Use

1. On first launch, accept the onboarding dialog that enables translation and selects the built-in model
2. Pick a target language; choosing Simplified Chinese shows the original text and sends no requests
3. On the AI features page, switch engines, entering a base URL, API key and model name for the own-API mode
4. Open any video and the interface and titles are queued for translation, with results cached in GetStorage
5. For danmaku, turn on the toggle in the player's top-right corner and confirm the prompt
6. To cache audio or download video, use the video page menu entries for cached audio and download to local folder

Target Audience

• Non-Chinese bilibili viewers
• Users needing Traditional Chinese or dialect UI
• Anime viewers who prefer Japanese audio
• Users running their own translation endpoint
• Desktop users who browse bilibili

System Requirements

Item	Requirement
OS	Android 7.0+, Windows, Linux
SDK levels	minSdk 24, targetSdk 37
Build stack	Flutter 3.47.2, Dart 3.13+
Network	Access to bilibili APIs and the chosen translation endpoint
Storage	A writable folder for downloads and subtitle caches

Notes

• Simplified Chinese passthrough: a zh-CN target returns the original text without any request
• Batching differs: the built-in engine sends one string per request, while own-API mode sends up to 16 per request with at most 10 in flight
• Danmaku lag: on very dense danmaku the original may appear first and is replaced in place once the translation lands
• Network needed: without a connection, every target except Simplified Chinese stays untranslated
• Unpackaged platforms: iOS and tablet builds are not provided