Translations ============ The Qt GUI can be easily translated into other languages. Here's how we handle those translations. Files and Folders ----------------- ### bitcoin-qt.pro This file takes care of generating `.qm` files from `.ts` files. It is mostly automated. ### src/qt/bitcoin.qrc This file must be updated whenever a new translation is added. Please note that files must end with `.qm`, not `.ts`. locale/bitcoin_en.qm ... ### src/qt/locale/ This directory contains all translations. Filenames must adhere to this format: bitcoin_xx_YY.ts or bitcoin_xx.ts #### bitcoin_en.ts (Source file) `src/qt/locale/bitcoin_en.ts` is treated in a special way. It is used as the source for all other translations. Whenever a string in the code is changed this file must be updated to reflect those changes. This can be accomplished by running `lupdate` (included in the Qt SDK). Also, a custom script is used to extract strings from the non-Qt parts: python share/qt/extract_strings_qt.py lupdate bitcoin-qt.pro -no-obsolete -locations none -ts src/qt/locale/bitcoin_en.ts ##### Handling of plurals in the source file When new plurals are added to the source file, it's important to do the following steps: 1. Open bitcoin_en.ts in Qt Linguist (also included in the Qt SDK) 2. Search for `%n`, which will take you to the parts in the translation that use plurals 3. Look for empty `English Translation (Singular)` and `English Translation (Plural)` fields 4. Add the appropriate strings for the singular and plural form of the base string 5. Mark the item as done (via the green arrow symbol in the toolbar) 6. Repeat from step 2. until all singular and plural forms are in the source file 7. Save the source file ##### Creating the pull-request An updated source file should be merged to github and Transifex will pick it up from there (can take some hours). Afterwards the new strings show up as "Remaining" in Transifex and can be translated. To create the pull-request you have to do: git add src/qt/bitcoinstrings.cpp src/qt/locale/bitcoin_en.ts git commit Syncing with Transifex ---------------------- We are using https://transifex.com as a frontend for translating the client. https://www.transifex.com/projects/p/bitcoin/resource/tx/ The "Transifex client" (see: http://help.transifex.com/features/client/) will help with fetching new translations from Transifex. Use the following config to be able to connect with the client: ### .tx/config [main] host = https://www.transifex.com [bitcoin.tx] file_filter = src/qt/locale/bitcoin_.ts source_file = src/qt/locale/bitcoin_en.ts source_lang = en ### .tx/config (for Windows) [main] host = https://www.transifex.com [bitcoin.tx] file_filter = src\qt\locale\bitcoin_.ts source_file = src\qt\locale\bitcoin_en.ts source_lang = en It is also possible to directly download new translations one by one from the Transifex website. ### Fetching new translations 1. `tx pull -a` 2. update `src/qt/bitcoin.qrc` manually or via `ls src/qt/locale/*ts|xargs -n1 basename|sed 's/\(bitcoin_\(.*\)\).ts/locale/\1.qm<\/file>/'` 3. `git add` new translations from `src/qt/locale/`