I'd love to study something from each of the thirteen families of languages, but I think almost all of these are from the Indo-European branch... oops.

• French
• Mexican Spanish
• Russian
• Catalan
• Sindarin
• Quenya
• Portuguese
• Italian
• Swedish
• English
• Polish
• ancient Greek
• Menomonee
• Breton
• Castilian Spanish
• Irish
• Welsh
• Hebrew
• Yiddish
• Latin
• Arabic
• Ukrainian
• American Sign Language
• British Sign Language
• Romanian
• Occitan (Provençal)
• Gothic
• German
• Manx Gaelic
• Scots Gaelic
• Farsi
• Sanskrit
• Aramaic
• Mongolian