add README for i18n

README.markdown

@@ -50,6 +50,11 @@ Build and Run
 
 See <https://github.com/haiwen/seafile/wiki>
 
+Internationalization (I18n)
+==========
+
+See [po/i18n.markdown](https://github.com/haiwen/seafile/blob/master/po/README.markdown)
+
 Change Logs
 ===========
 

po/i18n.markdown

@@ -0,0 +1,61 @@
+You are welcome to add translation to seafile client in your language.
+
+## Step 1: Translate the basic client
+
+### To create a new translation
+
+For example, if you like to add Russian translation.
+
+- Make sure you can [Build Seafile Client from source](https://github.com/haiwen/seafile/wiki/Build-and-use-seafile-client-from-source)
+
+- Go to the `po/` directory
+
+- Edit the `LINGUAS` file, insert the language code for Russian `ru` (Pay attention to keep the list of language codes in alphabetic order)
+
+```
+de_DE
+fr
+ru
+zh_CN
+```
+
+- Run `intltool-udpate --pot`, and copy `seafile.pot` to `ru.po`
+
+- Edit the header part of the file `ru.po`. Change the header fileds:
+  - Set the value of `Language` to `ru`
+  - Set the value of `charset` to `UTF-8`
+  
+- Translate the entries of `ru.po` one by one
+
+### To update or check an existing translation
+
+For example, you want to update the Russian translation
+
+- Go to the `po/` directory
+- Update the translation file by running:
+
+```
+intltool-udpate ru
+```
+- Check and edit `ru.po`. Search for all messages marked **fuzzy**, and remov the word **fuzzy** when they are done.
+
+- Continue running `intltool-update ru` and check that you have 0 fuzzy and 0 untranslated, then you're finished.
+
+## Step 2: Translate the local web interface of Seafile Client
+
+Translating the local web interface involves a bit more work to do. However, you can just finish the following steps and leave the rest work to seafile developers.
+
+Again let's take Russian translation as an example.
+
+- Go to the `web/i18n` directory
+- Create a directory  `web/i18n/ru/LC_MESSAGES/`
+- Copy an existing translation as a template
+
+```
+cp web/i18n/zh_CN/LC_MESSAGES/messages.po web/i18n/ru/LC_MESSAGES/
+```
+- Edit the `messages.po` entry by entry.
+
+## Step 3: Contribute your translation to Seafile
+
+Fork seafile and send us a pull request, we'll check and handle the rest of the work.