Here are some of the best PHP dating scripts that meet your requirements:

1. Chameleon Dating Software
Scalability: Suitable for small and large dating platforms

Customization: Offers a drag-and-drop builder and open-source code

User Experience: Modern design with mobile responsiveness

Payment Integrations: Supports PayPal, Stripe, and cryptocurrency payments

Multi-Lingual & Multi-Currency: Yes

2. PG Dating Pro
Scalability: Cloud-based and self-hosted options

Customization: Open code for extensive modifications

User Experience: AI-based matching, video chat, and gamification features

Payment Integrations: Supports multiple gateways like PayPal, Stripe, and Skrill

Multi-Lingual & Multi-Currency: Yes

3. SkaDate
Scalability: Enterprise-grade architecture

Customization: Open-source and extendable with plugins

User Experience: Built-in PWA (Progressive Web App) for mobile users

Payment Integrations: Multiple payment gateways

Multi-Lingual & Multi-Currency: Yes

4. Dating Script by VLDPersonals
Scalability: Works for niche and mainstream dating sites

Customization: 100% unencrypted PHP source code

User Experience: Responsive UI with advanced search filters

Payment Integrations: Built-in support for Stripe and PayPal

Multi-Lingual & Multi-Currency: Yes

5. DatingFramework
Scalability: Suitable for startups and large-scale platforms

Customization: Modular architecture with API support

User Experience: AI-powered matchmaking and social networking features

Payment Integrations: Supports multiple payment gateways

Multi-Lingual & Multi-Currency: Yes

Final Recommendation
If you want a fully-featured and modern solution, go for PG Dating Pro or Chameleon Dating Software.

If you need maximum customization, SkaDate and VLDPersonals are good choices.

For an AI-powered experience, DatingFramework stands out.

Would you like recommendations for additional plugins or marketing tools for your dating site? Feel free to book a call.