Wrong language used when you pass numbers as numbers into speak func

[ocean-beach]

🐛 Bug Report

Starting from ^4.0.0 when you pass numbers into speak func, e.g. await _flutterTts.speak(7) it will read it in device system language instead of the language you set before.

all good:

await _flutterTts.setLanguage("sv-SE");
await _flutterTts.speak("något prov");

not good, uses system default language instead of Swedish:

await _flutterTts.setLanguage("sv-SE");
await _flutterTts.speak("7");

When I downgraded to flutter_tts: ^3.8.5, it worked as expected

Expected behavior

Read numbers in the language you set

Reproduction steps

Use Android and Install flutter_tts: 4.0.0 or higher and try to call this code
await _flutterTts.setLanguage("sv-SE");
await _flutterTts.speak("7");
You will notice it doesn't use the language you set

Configuration

Version: 4.0.0 and higher

Platform:

• 📱 iOS
• [ X ] 🤖 Android