需求
测试国际化，执行自动化测试脚本前，需要设置语言

现状
按照官方文档，设置了语言，执行程序报错

报错信息：
Driver info: driver.version: AndroidDriver
remote stacktrace: UnknownError: An unknown server-side error occurred while processing the command. Original error: Failed to set language: fr and country: undefined
at getResponseForW3CError (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/protocol/errors.js:826:9)
at asyncHandler (/Applications/Appium.app/Contents/Resources/app/node_modules/appium/node_modules/appium-base-driver/lib/protocol/protocol.js:447:37)
at process._tickCallback (internal/process/next_tick.js:68:7)

官网文档

程序