### Godot version

4.0.dev (ba9491f87)

### System information

Windows 11 Chrome 109.0.5414.75 (Official Build), iOS 16.2 Safari

### Issue description

When exporting a simple project for Web with any GDScript like following:
```gdscript
extends Control

```
will print the following error to the console:
```
USER ERROR: U_ILLEGAL_ARGUMENT_ERROR
   at: _is_confusable (modules\text_server_adv\text_server_adv.cpp:6151)
```

![image](https://user-images.githubusercontent.com/173001/214089154-d88f3f44-b670-41ec-9743-30627677968e.png)

For more complex project, following additional errors are showing:
```
USER ERROR: U_FILE_ACCESS_ERROR
   at: _spoof_check (modules\text_server_adv\text_server_adv.cpp:6174)
USER ERROR: U_ILLEGAL_ARGUMENT_ERROR
   at: _is_confusable (modules\text_server_adv\text_server_adv.cpp:6151)
```
When I've inserted `print_line(p_string)` at text_server_adv.cpp line 6172, following logs are collected:
![image](https://user-images.githubusercontent.com/173001/214091164-cb5af630-56d2-446e-b1c4-dc20066565d5.png)

It seems that the identifiers of *.gd files are printed to the console.


### Steps to reproduce

1. Open minimal reproduction project.
2. Exports to Web.
3. Open exported site with Chrome and open developer console.
4. Following error logs will be seen (reproduced): `USER ERROR: U_ILLEGAL_ARGUMENT_ERROR`

### Minimal reproduction project

[text_server_adv_error.zip](https://github.com/godotengine/godot/files/10481582/text_server_adv_error.zip)

ccpert("ccp_BD"));
		ccpert("ccp_IN"));
		ccp.digits = U"𑄶𑄷𑄸𑄹𑄺𑄻𑄼𑄽𑄾𑄿.";
		ccpsign = U"%";
		ccp.exp = U"e";
		num_systems.push_back(ccp);
	}
	// Adlam numerals.
	{
		NumSystemData ff;
		ffert("ff")); // Fulah
		ffert("ff_Adlm_BF"));
		ffert
		ffert("ff_Adlm_GH"));
		ffert("ff_Adlm_GM"));
		ffert("ff_Adlm_GN"));
		ffert("ff_Adlm_GW"));
		ffert("ff_Adlm_LR"));
		ffert("ff_Adlm_MR"));
		ffert("ff_Adlm_NE"));
		ffert("ff_Adlm_NG"));
		ffert("ff_Adlm_SL"));
		ffert("ff_Adlm_SN"));
		ff.digits = U"𞥐𞥑𞥒𞥓𞥔𞥕𞥖𞥗𞥘𞥙.";
		ffsign = U"%";
		ff.exp = U"e";
		num_systems.push_back(ff);
	}
}
String TextServerAdvanced::_format_number(const String &p_string, const String &p_language) const {