According to the font info, the ones from the Apple website have accented characters for:

Afrikaans, Albanian, Asu, Basque, Bemba, Bena, Bosnian, Catalan, Chiga, Congo Swahili, Cornish, Croatian, Czech, Danish, Dutch, Embu, English, Esperanto, Estonian, Faroese, Filipino, Finnish, French, Galician, German, Gusii, Hungarian, Icelandic, Igbo, Indonesian, Irish, Italian, Kabuverdianu, Kalenjin, Kamba, Kikuyu, Kinyarwanda, Latvian, Lithuanian, Luo, Luyia, Machame, Makhuwa-Meetto, Makonde, Malagasy, Malay, Maltese, Manx, Meru, Morisyen, North Ndebele, Norwegian Bokmål, Norwegian Nynorsk, Nyankole, Oromo, Polish, Portuguese, Romanian, Romansh, Rombo, Rundi, Rwa, Samburu, Sango, Sangu, Sena, Shambala, Shona, Slovak, Slovenian, Soga, Somali, Spanish, Swahili, Swedish, Swiss German, Taita, Teso, Turkish, Turkmen, Vietnamese, Vunjo, Welsh, Yoruba and Zulu

It probably doesn't support Japanese, Chinese or Arabic, so mulling over how the alphabet looks on this font seems to be the only reasonable thing to discuss in regards to this font.

There aren't that many fonts that supports 10's of thousands of glyphs and most of those just reuse from a standard set.

Given that the majority of HN is an English-speaking audience, it's all that most folks need.

…The majority speak English as one of their languages :)