Hello, @Darul Muqarrabin Malaysia,
1- Actually, for the Currency switcher, you have to first install and configure the WOOCS plugin and for the language switcher you have to use the WPML plugin.
Check the article links of both the plugins to know how to setup these plugins with our theme:
https://xstore.helpscoutdocs.com/article/31-translation-with-wpml
https://xstore.helpscoutdocs.com/article/141-xstore-currency-switcher
Now, to show the switcher on the header top please watch this video for a better reference: https://streamable.com/lkgzrf
2- In order to know how to add a button next to my account please watch this video for a better reference: https://streamable.com/v5be23
Regards 8Themes Team.
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