Modify a website and complete its construction

I am looking to modify a website and complete its construction. The platform that the website will be built on is Shopify, and no new functionalities are required; this job is only related to website construction and modification. The website is estimated to be large, containing more than 21 pages. If you are capable of completing this project, I look forward to hearing from you.
Add language and currency and confirmation multi vendor marketplace and fixed any problems in the website.