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Translations
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============
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The Qt GUI can be easily translated into other languages. Here's how we
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handle those translations.
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Files and Folders
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-----------------
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### bitcoin-qt.pro
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This file takes care of generating `.qm` files from `.ts` files. It is mostly
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automated.
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### src/qt/bitcoin.qrc
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This file must be updated whenever a new translation is added. Please note that
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files must end with `.qm`, not `.ts`.
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<qresource prefix="/translations">
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<file alias="en">locale/bitcoin_en.qm</file>
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...
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</qresource>
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### src/qt/locale/
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This directory contains all translations. Filenames must adhere to this format:
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bitcoin_xx_YY.ts or bitcoin_xx.ts
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#### Source file
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`src/qt/locale/bitcoin_en.ts` is treated in a special way. It is used as the
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source for all other translations. Whenever a string in the code is changed
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this file must be updated to reflect those changes. Usually, this can be
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accomplished by running `lupdate` (included in the Qt SDK).
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An updated source file should be merged to github and transifex will pick it
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up from there. Afterwards the new strings show up as "Remaining" in transifex
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and can be translated.
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Syncing with transifex
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----------------------
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We are using http://transifex.net as a frontend for translating the client.
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https://www.transifex.net/projects/p/bitcoin/resource/tx/
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The "transifex client" (see: http://help.transifex.net/features/client/)
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will help with fetching new translations from transifex. Use the following
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config to be able to connect with the client.
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### .tx/config
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[main]
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host = https://www.transifex.net
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[bitcoin.tx]
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file_filter = src/qt/locale/bitcoin_<lang>.ts
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source_file = src/qt/locale/bitcoin_en.ts
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source_lang = en
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### .tx/config (for Windows)
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[main]
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host = https://www.transifex.net
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[bitcoin.tx]
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file_filter = src\qt\locale\bitcoin_<lang>.ts
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source_file = src\qt\locale\bitcoin_en.ts
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source_lang = en
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It is also possible to directly download new translations one by one from transifex.
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### Fetching new translations
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1. `tx pull -a`
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2. update `src/qt/bitcoin.qrc` manually or via
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`ls src/qt/locale/*ts|xargs -n1 basename|sed 's/\(bitcoin_\(.*\)\).ts/<file alias="\2">locale/\1.qm<\/file>/'`
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3. `git add` new translations from `src/qt/locale/`
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