Hello,
First of all thanks for choosing our Theme, we are glad to be you in the WoodMart WordPress family :-)
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I saw the screenshots you attached.
1) To edit the headings of best sellers, featured, and sales you need to edit the page and edit the products tabs module of Wp-Bakery Page Builder.
Screenshots for Clarification: https://ibb.co/rQTcJKX
You can set the data source according to your requirement: https://ibb.co/sRgpGbZ
2) To change the color of the top bar you need to Go to WoodMart >> Header Builder >> Edit Header >> Top bar.
Screenshot for Clarification: https://ibb.co/Zxn1qMc
3) To change the color schemes you need to Go to Theme Settings >> Styles & Colors >> Primary Color.
Screenshot for Clarification: https://ibb.co/DQ01p4N
4) To translate your website you can use WPML Plugin and you can read our detailed documentation: https://xtemos.com/docs/woodmart/translation/
Best Regards.