Website Improvement, Mobile Optimization

Subject: Website Improvement, Mobile Optimization, and Multilingual Setup
Hello,
I would like to improve my website.
The website is dedicated to a board game. My main objectives are the following:
Mobile-first optimization
Most of my users visit the website from their mobile phones. I want the website to be fully optimized for mobile usage (UX/UI, loading speed, navigation, checkout if applicable).
Multilingual setup (French / English / Arabic)
I currently have:
A French version of the game
An English version of the game
Arabic content as well
I am not sure about the best technical solution, and I would like your recommendation:
Should I keep one single website with multiple languages (language selector)?
Or should I create separate versions of the website (for example: FR / EN / AR)?
I want a clean, scalable, and professional solution.
E-commerce considerations (B2C)
The website must support B2C orders:
French-speaking customers
English-speaking customers
This includes proper language handling for:
Product pages
Checkout
Emails / order confirmations
Customer experience in general
Please let me know:
Your recommended approach
Your experience with multilingual websites
The estimated timeline
The cost
Thank you, and I look forward to your proposal.
Best regards,
Hakim
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