Fix Website Encoding Issue

I'm seeking an experienced developer to fix a persistent encoding issue on my Opencart website. The problem affects the proper display of content, and I need a solution that addresses the root cause, not just the symptoms.

Requirements:
- Identify and resolve the root cause of the encoding issue
- Ensure all website content displays correctly in Traditional Chinese & Simplified Chinese
- Update and verify content after the fix

Ideal Skills:
- Proficiency in Opencart
- Strong understanding of character encoding and multilingual content display
- Experience with debugging and resolving CMS-related issues
- Attention to detail and thorough testing skills

Payment will be made once the content is updated and displays correctly in the intended language.

Please find attached file.