[FLINK-11732] Add a language switch to the sidebar for Flink documents

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.9.0
• Component/s: chinese-translation, Documentation
• Labels: pull-request-available
• Assignee: Jark Wu
• Reporter: Jark Wu
• Created: 23/Feb/19 03:55
• Updated: 05/May/19 10:24
• Resolved: 05/May/19 10:24

Description

Add a language switch similar to the project webpage.

We didn't add the switch in the first version of supporting Chinese language, because we want to expose the switch when we satisfied the translation coverage.

Issue Links

• links to: GitHub Pull Request #8238