Changing language

Login to you console and Click on Settings (You may use google translator to Identify it in English)

In the Localization and default Region you have the option to change the Language!

Now you have your preferred language with you! This should set your preferred language to English across all AWS services and the console. If you continue to have issues, Please clear you browser cache or try logging in from different device and it should solve the problem. There are certain settings at the browser level that you might want to revisit to resolve this issue. As browser does have the Language setting which needs to be altered.

If you have already changed the language settings in the management console and the language is not reflected, please review the language settings in your browser as well.
https://support.google.com/chrome/answer/173424?hl=ja&co=GENIE.Platform%3DDesktop