Hi Reiko Ando 

No, the language flavor should not take up one of your 5 languages. For resetting the languages please see https://gateway.sdl.com/apex/communityknowledge?articleName=0000043

No, repairing your Trados installation does not revert everything to the default settings.

Kind regards,

Hi Elisa ,

Thank you for your reply.

So, can I understand that UK English, US English, and any other English variations are counted as one language of the five, and repairing keeps all add-ins and customization?

As for the registry in the link you mentioned, I'm not sure what this does. Will it allow me to change the language without repairing or reinstalling Studio?

Yes, please see this, down the page https://docs.rws.com/783545/338184/sdl-trados-studio/supported-languages 

Yes, the following articles indicate how to reset the languages without reinstalling Trados: https://community.rws.com/product-groups/trados-portfolio/trados-studio/w/customer-experience/5203/03-7-changing-the-installed-languages-trados-studio-2019-freelance-or-earlier-versions-only#:~:text=Trados%20Studio%20Freelance%20(2019%20or,be%20changed%20easily%20once%20selected.&text=The%20following%20instructions%20require%20that,accessing%20and%20editing%20registry%20entries. and  https://gateway.sdl.com/apex/communityknowledge?articleName=0000043

Kind regards,

Yes, please see this, down the page https://docs.rws.com/783545/338184/sdl-trados-studio/supported-languages 

Yes, the following articles indicate how to reset the languages without reinstalling Trados: https://community.rws.com/product-groups/trados-portfolio/trados-studio/w/customer-experience/5203/03-7-changing-the-installed-languages-trados-studio-2019-freelance-or-earlier-versions-only#:~:text=Trados%20Studio%20Freelance%20(2019%20or,be%20changed%20easily%20once%20selected.&text=The%20following%20instructions%20require%20that,accessing%20and%20editing%20registry%20entries. and  https://gateway.sdl.com/apex/communityknowledge?articleName=0000043

Kind regards,

Thank you!