Using Intl extension to anglicisation

[vibbow]

Description:

This fix the issue iconv will raise a Notice on some character.

For example:

$src = 'Debubawi K’eyyĭḥ Baḥri';
echo iconv('UTF-8', 'ASCII//TRANSLIT', $src);

// Expect output:
Debubawi K'eyyih Bahri

// Actually behaviour: 
Notice: iconv(): Detected an illegal character in input string

This should fix bug #22321

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed