Greek alphabet can be used for these languages, plus many others:
Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω
Greek [European Humanities]
Latin/Roman Alphabet can be used for a very large array of languages, including these plus MANY others. Many of these languages add extra diacritics to the Latin alphabet:
English, French, Spanish, Catalan, German, Italian, Portuguese, Norwegian, Finnish, etc. [HCRE, plus all other selectors]
Many Native American languages [HCRE]
Afrikaans, Zulu, Xhosa, Tswana, Bambara, etc. [Africa]
Filipino, Tagalog, Indonesian, Malay, Vietnamese, etc. [Southeast Asia]