What unicode/non-Latin test cases are covered?

The repository covers an extensive range of Unicode and non-Latin test cases across multiple languages:

Germanic languages:

• German umlauts: ä ö ü Ä Ö Ü ß [test.js:L109-L111]

Asian languages:

• Vietnamese: ố Ừ Đ [test.js:L113-L115]

Middle Eastern languages:

• Arabic: ث س و [test.js:L117-L119]
• Persian/Farsi: چ ی پ [test.js:L121-L123]
• Urdu: ٹ ڈ ھ [test.js:L126-L128]
• Pashto: ګ ړ څ [test.js:L130-L132]

Slavic languages:

• Russian: Ж п ю [test.js:L134-L136]

Other European languages:

• Romanian: ș Ț [test.js:L138-L140]
• Turkish: İ ı Ş ş Ç ç Ğ ğ [test.js:L142-L144]
• Armenian: Ե ր ե ւ ա ն [test.js:L146-L148]

Other test cases:

• Emoji replacements (unicorns, love hearts, dogs) [test.js:L101-L105]
• Transliterate option with non-ASCII characters including Chinese and Arabic [test.js:L239-L247]
• Locale-specific transliteration (Swedish vs German) [test.js:L217-L224]

The README indicates support extends beyond these tested cases, mentioning that "It handles most major languages" including German (umlauts), Vietnamese, Arabic, Russian, and more.

FOLLOW_UPS:

• How does the transliterate dependency handle languages?
• What happens with the locale option in detail?
• How are custom replacements applied to non-ASCII?